System and method of determining paging occasions for transmitting and receiving paging

ABSTRACT

A communication method and system for converging a 5th-generation (5G) communication system for supporting higher data rates beyond a 4th-generation (4G) system with a technology for Internet of things (IoT) are provided. The t disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The disclosure provides a method and an apparatus for determining paging occasions (PO).

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is a continuation application of prior Application Ser.No. 16/429,548, filed on Jun. 3, 2019, which will be issued as U.S. Pat.No. 10,887,864 on Jan. 5, 2021, which is based on and claimed priorityunder 35 U.S.C. § 119(e) of a U.S. Provisional application Ser. No.62/680,765, filed on Jun. 5, 2018, in the U.S. Patent and TrademarkOffice, the disclosure of which is incorporated by reference herein inits entirety.

BACKGROUND 1. Field

The disclosure relates to a wireless communication system. Moreparticularly, the disclosure relates to an apparatus, a method and asystem for determining paging occasions (PO) for transmitting andreceiving paging in wireless communication system.

2. Description of Related Art

To meet the demand for wireless data traffic that has increased sincedeployment of 4th-generation (4G) communication systems, efforts havebeen made to develop an improved 5th-generation (5G) or pre-5Gcommunication system. Therefore, the 5G or pre-5G communication systemis also called a ‘Beyond 4G Network’ or a ‘Post LTE System’. The 5Gcommunication system is considered to be implemented in higher frequency(mmWave) bands, e.g., 60 GHz bands, so as to accomplish higher datarates. To decrease propagation loss of the radio waves and increase thetransmission distance, the beamforming, massive multiple-inputmultiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna,an analog beam forming, large scale antenna techniques are discussed in5G communication systems. In addition, in 5G communication systems,development for system network improvement is under way based onadvanced small cells, cloud radio access networks (RANs), ultra-densenetworks, device-to-device (D2D) communication, wireless backhaul,moving network, cooperative communication, coordinated multi-points(CoMP), reception-end interference cancellation and the like. In the 5Gsystem, hybrid frequency shift keying (FSK) and quadrature amplitudemodulation (QAM) (FQAM) and sliding window superposition coding (SWSC)as an advanced coding modulation (ACM), and filter bank multi carrier(FBMC), non-orthogonal multiple access (NOMA), and sparse code multipleaccess (SCMA) as an advanced access technology have been developed.

The Internet, which is a human centered connectivity network wherehumans generate and consume information, is now evolving to the Internetof things (IoT) where distributed entities, such as things, exchange andprocess information without human intervention. The Internet ofeverything (IoE), which is a combination of the IoT technology and theBig Data processing technology through connection with a cloud server,has emerged. As technology elements, such as “sensing technology”,“wired/wireless communication and network infrastructure”, “serviceinterface technology”, and “Security technology” have been demanded forIoT implementation, a sensor network, a machine-to-machine (M2M)communication, machine type communication (MTC), and so forth have beenrecently researched. Such an IoT environment may provide intelligentInternet technology services that create a new value to human life bycollecting and analyzing data generated among connected things. IoT maybe applied to a variety of fields including smart home, smart building,smart city, smart car or connected cars, smart grid, health care, smartappliances and advanced medical services through convergence andcombination between existing information technology (IT) and variousindustrial applications.

In line with this, various attempts have been made to apply 5Gcommunication systems to IoT networks. For example, technologies such asa sensor network, MTC, and M2M communication may be implemented bybeamforming, MIMO, and array antennas. Application of a cloud radioaccess network (RAN) as the above-described Big Data processingtechnology may also be considered to be as an example of convergencebetween the 5G technology and the IoT technology.

Meanwhile, there have been various studies on paging for 5Gcommunication system recently.

The above information is presented as background information only toassist with an understanding of the disclosure. No determination hasbeen made, and no assertion is made, as to whether any of the abovemight be applicable as prior art with regard to the disclosure.

SUMMARY

Aspects of the disclosure are to address at least the above-mentionedproblems and/or disadvantages and to provide at least the advantagesdescribed below. Accordingly, an aspect of the disclosure is to providean apparatus and method for performing a random access back off inwireless communication system.

Additional aspects will be set forth in part in the description whichfollows and, in part, will be apparent from the description, or may belearned by practice of the presented embodiments.

In accordance with an aspect of the disclosure, a method by a terminalfor determining paging occasion (PO) is provided. The method includesreceiving, from a base station (BS), first information on a number ofpaging frames in a discontinuous reception (DRX) cycle and secondinformation on a number of POs for a paging frame, identifying a pagingframe based on the first information, identifying an index of a PO basedon the first information and the second information, and monitoring apaging in one or more physical downlink control channel (PDCCH) based onthe index.

In accordance with another aspect of the disclosure, a terminal fordetermining PO is provided. The terminal comprises a transceiverconfigured to transmit and receive a signal, and a controller configuredto receive, from a BS, first information on a number of paging frames ina DRX cycle and second information on a number of POs for a pagingframe, identify a paging frame based on the first information, identifyan index of a PO based on the first information and the secondinformation, and monitor a paging in one or more PDCCH based on theindex.

In accordance with another aspect of the disclosure, a method by a BSfor determining PO is provided. The method comprises transmitting, to aterminal, first information on a number of the paging frames in a DRXcycle and second information on a number of POs for a paging frame, andtransmitting, to the terminal, downlink control information (DCI) forpaging in a PO in a paging frame, wherein the paging frame is identifiedbased on the first information, and wherein an index for the PO isidentified based on the first information and the second information,and wherein one or more PDCCH is monitored for the DCI for paging basedon the index.

In accordance with another aspect of the disclosure, a BS fordetermining PO is provided. The BS comprises a transceiver configured totransmit and receive a signal, and a controller configured to transmit,to a terminal, first information on a number of paging frames in a DRXcycle and second information on a number of POs for a paging frame, andtransmit, to the terminal, DCI for paging in a PO in a paging frame,wherein the paging frame is identified based on the first information,and wherein an index for the PO is identified based on the firstinformation and the second information, and wherein one or more PDCCH ismonitored for the DCI for paging based on the index.

Other aspects, advantages, and salient features of the disclosure willbecome apparent to those skilled in the art from the following detaileddescription, which, taken in conjunction with the annexed drawings,discloses various embodiments of the disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of certainembodiments of the disclosure will be more apparent from the followingdescription taken in conjunction with the accompanying drawings, inwhich:

FIG. 1 illustrates an example of determining paging occasion (PO)according to an embodiment of the disclosure;

FIG. 2 illustrates another example of determining PO according to anembodiment of the disclosure;

FIG. 3 illustrates another example of determining PO according to anembodiment of the disclosure;

FIG. 4 illustrates another example of determining PO according to anembodiment of the disclosure;

FIG. 5 illustrates another example of determining PO according to anembodiment of the disclosure;

FIG. 6 illustrates another example of determining PO according to anembodiment of the disclosure;

FIG. 7 illustrates another example of determining PO according to anembodiment of the disclosure;

FIG. 8 illustrates another example of determining PO according to anembodiment of the disclosure;

FIG. 9 illustrates another example of determining PO according to anembodiment of the disclosure;

FIG. 10 illustrates another example of determining PO according to anembodiment of the disclosure;

FIG. 11 is a block diagram of a terminal according to an embodiment ofthe disclosure; and

FIG. 12 is a block diagram of a base station (BS) according to anembodiment of the disclosure.

Throughout the drawings, it should be noted that like reference numbersare used to depict the same or similar elements, features, andstructures.

DETAILED DESCRIPTION

The following description with reference to the accompanying drawings isprovided to assist in a comprehensive understanding of variousembodiments of the disclosure as defined by the claims and theirequivalents. It includes various specific details to assist in thatunderstanding but these are to be regarded as merely exemplary.Accordingly, those of ordinary skill in the art will recognize thatvarious changes and modifications of the various embodiments describedherein can be made without departing from the scope and spirit of thedisclosure. In addition, descriptions of well-known functions andconstructions may be omitted for clarity and conciseness.

The terms and words used in the following description and claims are notlimited to the bibliographical meanings, but, are merely used by theinventor to enable a clear and consistent understanding of thedisclosure. Accordingly, it should be apparent to those skilled in theart that the following description of various embodiments of thedisclosure is provided for illustration purpose only and not for thepurpose of limiting the disclosure as defined by the appended claims andtheir equivalents.

It is to be understood that the singular forms “a”, “an”, and “the”include plural referents unless the context clearly dictates otherwise.Thus, for example, reference to “a component surface” includes referenceto one or more of such surfaces.

By the term “substantially” it is meant that the recited characteristic,parameter, or value need not be achieved exactly, but that deviations orvariations, including for example, tolerances, measurement error,measurement accuracy limitations and other factors known to those ofskill in the art, may occur in amounts that do not preclude the effectthe characteristic was intended to provide.

It is known to those skilled in the art that blocks of a flowchart (orsequence diagram) and a combination of flowcharts may be represented andexecuted by computer program instructions. These computer programinstructions may be loaded on a processor of a general purpose computer,special purpose computer, or programmable data processing equipment.When the loaded program instructions are executed by the processor, theycreate a means for carrying out functions described in the flowchart.Because the computer program instructions may be stored in a computerreadable memory that is usable in a specialized computer or aprogrammable data processing equipment, it is also possible to createarticles of manufacture that carry out functions described in theflowchart. Because the computer program instructions may be loaded on acomputer or a programmable data processing equipment, when executed asprocesses, they may carry out operations of functions described in theflowchart.

A block of a flowchart may correspond to a module, a segment, or a codecontaining one or more executable instructions implementing one or morelogical functions, or may correspond to a part thereof. In some cases,functions described by blocks may be executed in an order different fromthe listed order. For example, two blocks listed in sequence may beexecuted at the same time or executed in reverse order.

In this description, the words “unit”, “module” or the like may refer toa software component or hardware component, such as, for example, afield-programmable gate array (FPGA) or an application-specificintegrated circuit (ASIC) capable of carrying out a function or anoperation. However, a “unit”, or the like, is not limited to hardware orsoftware. A unit, or the like, may be configured so as to reside in anaddressable storage medium or to drive one or more processors. Units, orthe like, may refer to software components, object-oriented softwarecomponents, class components, task components, processes, functions,attributes, procedures, subroutines, program code segments, drivers,firmware, microcode, circuits, data, databases, data structures, tables,arrays or variables. A function provided by a component and unit may bea combination of smaller components and units, and may be combined withothers to compose larger components and units. Components and units maybe configured to drive a device or one or more processors in a securemultimedia card.

Prior to the detailed description, terms or definitions necessary tounderstand the disclosure are described. However, these terms should beconstrued in a non-limiting way.

The “base station (BS)” is an entity communicating with a user equipment(UE) and may be referred to as BS, base transceiver station (BTS), nodeB (NB), evolved NB (eNB), access point (AP), 5G NB (5GNB), or gNB.

The “UE” is an entity communicating with a BS and may be referred to asUE, device, mobile station (MS), mobile equipment (ME), or terminal.

In the recent years several broadband wireless technologies have beendeveloped to meet the growing number of broadband subscribers and toprovide more and better applications and services. The 2nd-generation(2G) wireless communication system has been developed to provide voiceservices while ensuring the mobility of users. 3rd-generation (3G)wireless communication system supports not only the voice service butalso data service. In recent years, the 4th-generation (4G)communication system has been developed to provide high-speed dataservice. However, currently, the 4G wireless communication systemsuffers from lack of resources to meet the growing demand for high speeddata services. So 5th-generation (5G) wireless communication system isbeing developed to meet the growing demand for high speed data services,support ultra-reliability and low latency applications.

The 5G wireless communication system will be implemented not only inlower frequency bands but also in higher frequency (mmWave) bands, e.g.,10 GHz to 100 GHz bands, so as to accomplish higher data rates. Tomitigate propagation loss of the radio waves and increase thetransmission distance, the beamforming, massive multiple-inputmultiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna,an analog beam forming, large scale antenna techniques are beingconsidered in the design of fifth generation wireless communicationsystem. In addition, the 5G wireless communication system is expected toaddress different use cases having quite different requirements in termsof data rate, latency, reliability, mobility, etc. However, it isexpected that the design of the air-interface of the 5G wirelesscommunication system would be flexible enough to serve the UEs havingquite different capabilities depending on the use case and marketsegment the UE cater service to the end customer. Example use cases the5G wireless communication system wireless system is expected to addressis enhanced mobile broadband (eMBB), massive machine type communication(m-MTC), ultra-reliable low latency communication (URLL) etc. The eMBBrequirements like tens of Gbps data rate, low latency, high mobility soon and so forth address the market segment representing the conventionalwireless broadband subscribers needing internet connectivity everywhere,all the time and on the go. The m-MTC requirements like very highconnection density, infrequent data transmission, very long batterylife, low mobility address so on and so forth address the market segmentrepresenting the IoT/IoE envisioning connectivity of billions ofdevices. The URLL requirements like very low latency, very highreliability and variable mobility so on and so forth address the marketsegment representing the Industrial automation application,vehicle-to-vehicle/vehicle-to-infrastructure communication foreseen asone of the enabler for autonomous cars.

In the existing wireless communication system, the paging is transmittedto page the UE which are attached to the wireless communication networkbut are in idle mode. In the idle mode the UE wake ups at regularintervals (every paging discontinuous reception (DRX) cycle) for shortperiods to receive paging and other broadcast information. In a legacysystem, the UE monitors one paging occasion (PO) every DRX cycle. One POis a subframe/transmission time interval (TTI) of 1 ms duration. Therecan be several POs in a paging DRX cycle. The UE determines its PO basedon UE ID. The UE first determines the paging frame (PF) and thendetermine its PO amongst the PO(s) within the determined PF. One PF isradio frame (10 ms), which may contain one or multiple POs. Every radioframe in a DRX cycle can be a PF. There can be up to four POs in a PF.The subframes which can be PO in a PF are pre-defined i.e. subframe #0,subframe #4, subframe #5 and subframe #9. The network signals twoparameters. The first parameter is ‘T’ i.e. paging DRX cycle duration innumber of radio frames. The second parameter is ‘nB’ i.e. the totalnumber of POs in a paging DRX cycle. The parameter nB can be configuredto one value amongst 4T, 2T, T, T/2, T/4, T/8, T/16, or T/32. UEs aredistributed across several POs in the DRX cycle based on UE ID. SeveralUEs can be mapped to the same PO.

The PF for a UE is the radio frame with system frame number ‘SFN (systemframe number)’ which satisfies the equation SFN mod T=(T div N)*(UE_IDmod N); where N is equal to min (T, nB) and the UE_ID is equal to IMSI(International Mobile Subscriber Identity) mod 1024. Within thedetermined PF, the PO corresponds to i_s=floor (UE_ID/N) mod Ns; whereNs: max (1, nB/T); i_s can be 0, 1, 2 and 3. Mapping between i_s, Ns andsubframe within the paging frame is pre-defined.

In a PO, paging message is transmitted using physical downlink sharedchannel (PDSCH). A physical downlink common control channel (PDCCH)scheduling PDSCH carrying paging message is addressed to a P-RNTI(paging-radio network temporary identifier) if there is a paging messagein PDSCH. The P-RNTI is common for all UEs. So, the UE identity (i.e.IMSI or SAE-temporary mobile subscriber identity (S-TMSI)) is includedin paging message to indicate paging for a specific UE. The pagingmessage may include multiple UE identities to page multiple UEs. Thepaging message is broadcasted (i.e. PDCCH is masked with P-RNTI) overthe data channel (i.e. PDSCH).

In the existing method of determining PO, for nB<=T, there is only onePO in PF. For nB>T, there are multiple POs in a PF and every radio framein paging DRX cycle is a PF. So, for configuring multiple POs in a PF,network has to configure nB>T and as a result every radio frame in DRXcycle becomes a PF. It is not possible to configure some of the radioframes in DRX cycle as PF and have multiple POs in these PFs. This is aserious limitation in current design. In beamformed system a set ofsynchronization signal blocks (SSBs) are periodically transmitted usingbeam sweeping. UE can measure these SSBs and identify the TX/RX beam forreceiving paging. For longer SSB periodicity (such as 20, 40, 80, 160ms), multiple POs needs to configured at an interval longer than radioframe to meet the paging capacity.

An enhanced method of determining PO is needed.

Embodiment 1

FIG. 1 illustrates an example of determining PO according to anembodiment of the disclosure.

Referring to FIG. 1:

0) A UE acquires the paging configuration (Default DRX Cycle Duration,nB, Ns, Offset), paging search space configuration (if signaled by thenetwork) and the RMSI (remaining system information) configuration (e.g.the RMSI search space, the RMSI pattern info: Pattern 1, 2, 3) from thesystem information signaled by the network (110). The RMSI is also bereferred as SIB 1. The RMSI pattern is also referred as SS/P BCH blockand CORESET multiplexing pattern. In radio resource control (RRC)Connected State, the paging search space configuration is signaled bythe network for one or more configured bandwidth part(s) (BWP(s)) indedicated signaling and the UE uses the paging search spaceconfiguration of its active DL BWP.

1) The UE first derives a reference radio frame (120). The referenceframe is the radio frame with SFN which satisfies following Equation 1:SFN mod T=(T div N)*(UE_ID mod N)  Equation 1

Where,

T: DRX cycle of the UE. T is determined by the shortest of the UEspecific DRX values, if configured by the RRC or by the upper layers(e.g. non-access stratum (NAS)), and a default DRX value signaled in thesystem information. If the UE specific DRX is not configured by the RRCor by the upper layers, the default value is applied.

nB: nB is the number of paging frames in DRX cycle. nB is signaled bythe gNB in the system information. The values of nB can be T, T/2, T/4,T/8, T/16, T/32 and so on. It is to be noted that in legacy system nB isthe number of POs in DRX cycle.

N; min(T, nB)

In an example, the UE_ID can be {IMSI mod 1024} or {5G-S-TMSI mod 1024}.

2) The UE then determines the paging frame, where the paging frame isthe radio frame having an SFN equal to ‘SFN of reference frame+offset’(130). The Parameter Offset is signalled by the gNB in the systeminformation. Offset is in units of radio frames. For example, if thedetermined reference frame is SFN ‘X’ and the offset signalled by thenetwork is ‘Y’, paging frame is the radio frame were the SFN equals X+Y.

Paging frame is the radio frame with respect to which the UE determinesits PO. A PO associated with a PF may start in the PF or after the PF. APO which starts in the paging frame may end in the subsequent radioframe. 3) The UE then calculates an index i_s (140), where i_s isderived from the following Equation 2:i_s=floor(UE_ID/N)mod Ns, where  Equation 2

Ns: Ns*nB indicates the total number of POs in DRX cycle. Ns is thenumber of POs corresponding to or associated with a PF. The parameter Nsis signaled by the gNB in the system information.

N; min(T, nB)

In an example, the UE_ID can be IMSI mod 1024.

4) A UE monitors the PO indicated by i_s (150). If i_s=0, the UEmonitors the 1st PO; If i_s=1, the UE monitors the 2nd PO; If i_s=2, theUE monitors the 3rd PO; and so on.

5) A UE determines the PDCCH monitoring occasions corresponding to thePO indicated by i_s as follows:

Option 1: The Paging Search Space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space.

A gNB may signal paging search space configuration (comprising at leastone of parameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration). The UE determines a PDCCH monitoring occasion from the PDCCHmonitoring periodicity (Monitoring-periodicity-PDCCH-slot), the PDCCHmonitoring offset (Monitoring-offset-PDCCH-slot), and the PDCCHmonitoring pattern (Monitoring-symbols-PDCCH-within-slot) within a slot.The PDCCH monitoring occasions are there in the slots ‘x’ to x+duration,where the slot with number ‘x’ in a radio frame with number ‘y’satisfies the Equation 3:(y*(number of slots in a radio frame)+x−Monitoring-offset-PDCCH-slot)mod(Monitoring-periodicity-PDCCH-slot)=0;  Equation 3

The starting symbol of a PDCCH monitoring occasion in each slot havingPDCCH monitoring occasion is given byMonitoring-symbols-PDCCH-within-slot. The length (in symbols) of a PDCCHmonitoring occasion is given by the CORESET associated with the searchspace.

If the paging search space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space,based on paging search space configuration (comprising at least one ofparameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration), the UE knows the PDCCH monitoring occasions for paging in thedetermined PF and subsequent radio frames. The UE knows the 1st PDCCHmonitoring occasion for paging in the determined PF and also thesubsequent PDCCH monitoring occasions.

The PDCCH monitoring occasions for paging from the start of thedetermined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging from the start of the paging frame is sequentiallynumbered from 0. The maximum number (L) of SSBs per frequency band ispre-defined. The gNB signals the information (SSBPositionsInBurst)related to actual transmitted SSBs in the system information.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0-^(th) PDCCH monitoring occasions for paging. In other words, the1st PO is a set of 0 to X-1th PDCCH monitoring occasion for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging. In other words, the2nd PO is a set of X to 2X-1th PDCCH monitoring occasion for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging. In other words, the3rd PO is a set of 2X to 3X-1th PDCCH monitoring occasion for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is actual the transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 1. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the PF) issequentially numbered from 1. The maximum number (L) of SSBs perfrequency band is pre-defined. The gNB signals the information(SSBPositionsInBurst) related to actual transmitted SSBs in the systeminformation.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasions for paging. In other words,the 1st PO is a set of 1 to Xth PDCCH monitoring occasion for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging. In other words,the 2nd PO is a set of X+1 to 2Xth PDCCH monitoring occasion for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging. In other words,the 3rd PO is a set of 2X+1th to 3Xth PDCCH monitoring occasion forpaging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) is sequentially numbered from 0. The first PDCCH monitoringoccasion number for each PO can be signaled by the gNB. For example, ifNs is equal to 4, then the i_s values will be 0 to 3 and there are fourPOs. The gNB can signal the PDCCH monitoring occasion numbers (P, Q, R,S) one corresponding to each of the POs.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging. In other words, the1st PO is a set of P to P+X-1th PDCCH monitoring occasion for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom Q-^(th) PDCCH monitoring occasions for paging. In other words, the2nd PO is a set of Q to Q+X-1th PDCCH monitoring occasion for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom R-^(th) PDCCH monitoring occasions for paging. In other words, the3rd PO is a set of R to R+X-1th PDCCH monitoring occasion for paging.

A 4th PO is set of X consecutive PDCCH monitoring occasions startingfrom S-^(th) PDCCH monitoring occasions for paging and so on. In otherwords, the 4th PO is a set of S to S+X-1th PDCCH monitoring occasion forpaging.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to the actualtransmitted SSBs. In an embodiment, whether X is an actual transmittedSSBs or not can be indicated by the network in the system information.

In an embodiment, each PO can comprise of ‘R’ sub POs where each sub POconsists of ‘X’ PDCCH monitoring occasions, X is number of SSBs; in oneembodiment X is maximum number of SSBs i.e. L; in another embodiment Xis equal to actual transmitted SSBs. The number of sub POs i.e. R isalso signaled by gNB. In its PO (identified by PO index) UE may monitorone or more sub POs. The starting PDCCH monitoring occasion number ofeach of these sub POs of a PO is signaled by gNB. Alternatley, an offset‘0’ can be signaled between the sub POs. The starting PDCCH occasionsnumber of 1st sub PO is the starting PDCCH occasions number of PO. Let'ssay starting PDCCH monitoring occasion number of PO is P and offset isO. 1^(st) sub PO is a set of X consecutive PDCCH monitoring occasionsstarting from Pth PDCCH monitoring occasions for paging. 2^(nd) sub POis a set of X consecutive PDCCH monitoring occasions starting from(P+X+O)th PDCCH monitoring occasion for paging. 3^(rd) sub PO is a setof X consecutive PDCCH monitoring occasions starting from (P+2X+2O)thPDCCH monitoring occasion for paging and so on. Alternately, the PDCCHmonitoring occasions for paging from the start of the determined PF aresequentially numbered from 0. In other words, the PDCCH monitoringoccasions starting from the 1^(st) PDCCH monitoring occasion for pagingin the paging frame (or from the start of the paging frame) issequentially numbered from 0. The first PDCCH monitoring occasion numberfor a first PO can be signaled by the gNB. The gNB can also signal anoffset between the starting PDCCH monitoring occasion of each PO. Forexample, if Ns is equal to 4, then the i_s values will be 0 to 3 andthere are four POs. The gNB can signal the PDCCH monitoring occasionnumber (P) of the first PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+O)-th PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2O)-th PDCCH monitoring occasions for paging.

A 4th PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3O)-th PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to the actualtransmitted SSBs. In an embodiment, whether X is the actual transmittedSSBs or not can be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) is sequentially numbered from 0. The first PDCCH monitoringoccasion number for a first PO can be signaled by the gNB. The gNB canalso signal an offset between the last PDCCH monitoring occasion of a POand the starting PDCCH monitoring occasion of the next PO. For example,if Ns is equal to 4, then the i_s values will be 0 to 3 and there arefour POs. The gNB can signal the PDCCH monitoring occasion number (P) offirst the PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+X+O)-th PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2X+2O)-th PDCCH monitoring occasions for paging.

A 4th PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3X+3O)-th PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to the actualtransmitted SSBs. In an embodiment, whether X is actual transmitted SSBsor not can be indicated by the network in the system information.

Alternately, the slot index for a first PO can be signaled by the gNB.The gNB can also signal an offset between the starting slot of each PO.For example, if Ns is equal to 4, then the i_s values will be 0 to 3 andthere are four POs. The gNB can signal slot index (S) of the first POand an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S of a paging frame;

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S+O;

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S+2O;

A 4th PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S+3O and so on.

Where X is a number of SSBs. In one embodiment X is a maximum number ofSSBs (i.e., L). In another embodiment X is equal to actual transmittedSSBs. In an embodiment whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 2: The Paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space.

The UE determines the RMSI pattern from the RMSI configuration signaledby the gNB.

If RMSI pattern is 2 or 3

-   -   A 1st PO is the set of PDCCH monitoring occasions for the RMSI        in a 1st half frame of the determined PF    -   A 2nd PO is the set of PDCCH monitoring occasions for the RMSI        in a 2nd half frame of the determined PF

If RMSI pattern is 1

-   -   A 1st PO is the set of PDCCH monitoring occasions for an RMSI,        wherein the 1st PDCCH monitoring occasion starts in the        determined PF.

Option 3: If the paging search space is configured by the gNB, whereinthe searchSpaceId zero is configured for the Paging Search Space.

If the paging search space with search space Id zero is configured bythe gNB, PDCCH monitoring occasions for paging are same as PDCCHmonitoring occasions for the RMSI. Based on the RMSI configuration, theUE knows the PDCCH monitoring occasions for paging in the determined PFand subsequent radio frames. The UE knows the 1st PDCCH monitoringoccasion for paging in the PF and also the subsequent PDCCH monitoringoccasions for paging.

PDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the PF)are sequentially numbered from 0.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-th PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to the actualtransmitted SSBs. In an embodiment, whether X is the actual transmittedSSBs or not can be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions starting from the 1st PDCCHmonitoring occasion for paging in the paging frame (or from the start ofthe PF) is sequentially numbered from 1.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 4: Subframes or slots corresponding to each PO is pre-defined asin LTE.

Embodiment 2

FIG. 2 illustrates another example of determining PO according to anembodiment of the disclosure.

Referring to FIG. 2:

0) The UE acquires the paging configuration (Default DRX Cycle Duration,nB, Ns, Offset), paging search space configuration (if signaled by thenetwork) and an RMSI configuration (RMSI search space, RMSI patterninfo: Pattern 1, 2, 3) from the system information signaled by thenetwork (210). RMSI is also be referred as SIB1. RMSI pattern is alsoreferred as SS/PBCH block and CORESET multiplexing pattern. In the RRCConnected State, the paging search space configuration is signaled bythe network for one or more configured BWP(s) in dedicated signaling andthe UE uses the paging search space configuration of its active DL BWP.

1) The UE first derives a Paging frame (220). The paging frame is theradio frame with SFN which satisfies following Equation 4:(SFN+offset)mod T=(T div N)*(UE_ID mod N)  Equation 4

Where,

T: DRX cycle of the UE. T is determined by the shortest of the UEspecific DRX values, if configured by the RRC or by the upper layers(e.g. NAS), and a default DRX value signaled in the system information.If the UE specific DRX is not configured by the RRC or by the upperlayers, the default value is applied.

nB: nB is the number of paging frames in DRX cycle. nB is signaled bythe gNB in the system information. The values of nB can be T, T/2, T/4,T/8, T/16, T/32 and so on. It is to be noted that in legacy system nB isthe number of POs in DRX cycle.

N; min(T, nB)

In an example, the UE_ID can be {IMSI mod 1024} or {5G-S-TMSI mod 1024}.

The paging frame is the radio frame with respect to which the UEdetermines its PO. A PO associated with a PF may start in the PF orafter the PF. A PO which starts in the paging frame may end in thesubsequent radio frame.

The POs other than the first PO may start in the subsequent radio frameor in a paging frame.

2) The UE then calculates an index i_s (230), where i_s is derived fromthe following Equation 5:i_s=floor(UE_ID/N)mod Ns, where  Equation 5

Ns: Ns*nB indicates the total number of POs in DRX cycle. Ns is thenumber of POs corresponding to or associated with a PF. The parameter Nsis signaled by the gNB in the system information.

N; min(T, nB)

In an example, the UE_ID can be IMSI mod 1024.

3) The UE monitors the PO indicated by i_s (240). If i_s=0, the UEmonitors the 1st PO; If i_s=1, the UE monitors the 2nd PO; If i_s=2, theUE monitors the 3rd PO; and so on.

4) The UE determines the PDCCH monitoring occasions corresponding to thePO indicated by i_s as follows:

Option 1: The Paging Search Space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space.

The gNB may signal paging search space configuration (comprising atleast one of parameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration). The UE determines a PDCCH monitoring occasion from the PDCCHmonitoring periodicity (Monitoring-periodicity-PDCCH-slot), the PDCCHmonitoring offset (Monitoring-offset-PDCCH-slot), and the PDCCHmonitoring pattern (Monitoring-symbols-PDCCH-within-slot) within a slot.The PDCCH monitoring occasions are there in the slots ‘x’ to x+duration,where the slot with number ‘x’ in a radio frame with number ‘y’satisfies the Equation 6:(y*(number of slots in a radio frame)+x−Monitoring-offset-PDCCH-slot)mod(Monitoring-periodicity-PDCCH-slot)=0;  Equation 6

The starting symbol of a PDCCH monitoring occasion in each slot havingPDCCH monitoring occasion is given byMonitoring-symbols-PDCCH-within-slot. The length (in symbols) of a PDCCHmonitoring occasion is given in the corset associated with the searchspace.

If the paging search space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space,based on the paging search space configuration (comprising at least oneof parameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration), the UE knows the PDCCH monitoring occasions for paging in thedetermined PF and subsequent radio frames. The UE knows the 1st PDCCHmonitoring occasion for paging in the determined PF and also thesubsequent PDCCH monitoring occasions.

The PDCCH monitoring occasions for paging from the start of thedetermined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from start of the PF) aresequentially numbered from 0. The maximum number (L) of SSBs perfrequency band is pre-defined. The gNB signals the information(SSBPositionsInBurst) related to actual transmitted SSBs in the systeminformation.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0-^(th) PDCCH monitoring occasions for paging. In other words, the1st PO is a set of 0 to X-1th PDCCH monitoring occasion for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging. In other words, the2nd PO is a set of X to 2X-1th PDCCH monitoring occasion for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging. In other words, the3rd PO is a set of 2X to 3X-1th PDCCH monitoring occasion for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-th PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 1. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from start of the PF) issequentially numbered from 1. The maximum number (L) of SSBs perfrequency band is pre-defined. The gNB signals the information(SSBPositionsInBurst) related to the actual transmitted SSBs in thesystem information.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasions for paging. In other words,the 1st PO is a set of 1 to Xth PDCCH monitoring occasion for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging. In other words,the 2nd PO is a set of X+1 to 2Xth PDCCH monitoring occasion for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging. In other words,the 3rd PO is a set of 2X+1th to 3Xth PDCCH monitoring occasion forpaging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging and so on.

Where X is number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to an actualtransmitted SSBs. In an embodiment, whether X is the actual transmittedSSBs or not can be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the PF) issequentially numbered from 0. The first PDCCH monitoring occasion numberfor each PO can be signaled by the gNB. For example, if Ns is equal to4, then the i_s values will be 0 to 3 and there are four POs. The gNBcan signal the PDCCH monitoring occasion numbers (P, Q, R, S) onecorresponding to each of the POs.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom Q-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom R-^(th) PDCCH monitoring occasions for paging.

A 4th PO is set of X consecutive PDCCH monitoring occasions startingfrom S-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information. In anembodiment, each PO can comprise of ‘R’ sub POs where each sub POconsists of ‘X’ PDCCH monitoring occasions, X is number of SSBs; in oneembodiment X is maximum number of SSBs i.e. L; in another embodiment Xis equal to actual transmitted SSBs. The number of sub POs i.e. R isalso signaled by gNB. In its PO (identified by PO index) UE may monitorone or more sub POs. The starting PDCCH monitoring occasion number ofeach of these sub POs of a PO is signaled by gNB. Alternatley, an offset‘0’ can be signaled between the sub POs. The starting PDCCH occasionsnumber of 1st sub PO is the starting PDCCH occasions number of PO. Let'ssay starting PDCCH monitoring occasion number of PO is P and offset isO. 1^(st) sub PO is a set of X consecutive PDCCH monitoring occasionsstarting from Pth PDCCH monitoring occasions for paging. 2^(nd) sub POis a set of X consecutive PDCCH monitoring occasions starting from(P+X+O)th PDCCH monitoring occasion for paging. 3^(rd) sub PO is a setof X consecutive PDCCH monitoring occasions starting from (P+2X+2O)thPDCCH monitoring occasion for paging and so on.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the PF) issequentially numbered from 0. The first PDCCH monitoring occasion numberfor the first PO can be signaled by the gNB. The gNB can also signal anoffset between the starting PDCCH monitoring occasion of each PO. Forexample, if Ns is equal to 4, then the i_s values will be 0 to 3 andthere are four POs. The gNB can signal the PDCCH monitoring occasionnumber (P) of the first PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+O)-th PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2O)-th PDCCH monitoring occasions for paging.

A 4th PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3O)-th PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the PF) issequentially numbered from 0. The first PDCCH monitoring occasion numberfor the first PO can be signaled by the gNB. The gNB can also signal anoffset between last PDCCH monitoring occasion of a PO and starting PDCCHmonitoring occasion of the next PO. For example, if Ns is equal to 4,then the i_s values will be 0 to 3 and there are four POs. The gNB cansignal the PDCCH monitoring occasion number (P) of the first PO and anoffset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+X+O)-th PDCCH monitoring occasions for paging;

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2X+2O)-th PDCCH monitoring occasions for paging;

A 4th PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3X+3O)-th PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the slot index for the first PO can be signaled by the gNB.The gNB can also signal an offset between the starting slot of each PO.For example, if Ns is equal to 4, then the i_s values will be 0 to 3 andthere are four POs. The gNB can signal slot index (S) of the first POand an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S of a paging frame.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S+O.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S+2O.

A 4th PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S+3O and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 2: The Paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space

The UE determines the RMSI pattern from the RMSI configuration signaledby the gNB.

If RMSI pattern is 2 or 3

A 1st PO is the set of PDCCH monitoring occasions for the RMSI in a 1sthalf frame of the determined PF, and

-   -   A 2nd PO is the set of PDCCH monitoring occasions for the RMSI        in a 2nd half frame of the determined PF

If RMSI pattern is 1,

-   -   A 1st PO is the set of PDCCH monitoring occasions for the RMSI,        wherein the 1st PDCCH monitoring occasion starts in the        determined PF.

Option 3: The Paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space

If the paging search space with search space Id zero is configured bythe gNB, PDCCH monitoring occasions for paging are the same as PDCCHmonitoring occasions for the RMSI. Based on the RMSI configuration, theUE knows the PDCCH monitoring occasions for paging in the determined PFand subsequent radio frames. The UE knows the 1st PDCCH monitoringoccasion for paging in the PF and also the subsequent PDCCH monitoringoccasions for paging.

The PDCCH monitoring occasions starting from the 1st PDCCH monitoringoccasion for paging in the paging frame is sequentially numbered from 0.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging and so on.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-th PDCCH monitoring occasions for paging

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions starting from the 1st PDCCHmonitoring occasion for paging in the paging frame (or from the start ofthe PF) is sequentially numbered from 1.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging and so on.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 4: Subframes or slots corresponding to each PO is pre-defined asin LTE.

Embodiment 3

FIG. 3 illustrates another example of determining a PO according to anembodiment of the disclosure.

Referring to FIG. 3:

0) A UE acquires the paging configuration (Default DRX Cycle Duration,PF Interval, Ns, Offset), paging search space configuration (if signaledby the network) and an RMSI configuration (a RMSI search space, a RMSIpattern info: Pattern 1, 2, 3) from the system information signaled bythe network (310). The RMSI is also be referred as SIB1. The RMSIpattern is also referred as SS/PBCH block and CORESET multiplexingpattern. In the RRC Connected State, the paging search spaceconfiguration is signaled by the network for one or more configuredBWP(s) in dedicated signaling and the UE uses the paging search spaceconfiguration of its active DL BWP.

1) The UE first derives a reference radio frame (320). The referenceframe is the radio frame with the SFN which satisfies following Equation7:SFN mod T=(PF Interval)*(UE_ID mod N)  Equation 7

Where,

T: DRX cycle of the UE. T is determined by the shortest of the UEspecific DRX values, if configured by the RRC or by upper layers (e.g.NAS), and a default DRX value signaled in the system information. If theUE specific DRX is not configured by the RRC or by upper layers, thedefault value is applied.

A PF Interval: Interval at which a PF is present in the DRX cycle. ThePF interval is signaled by the gNB in the system information. The unitof the PF interval is in the radio frame.

N: T/PF Interval

In an example, the UE_ID can be {IMSI mod 1024} or {5G-S-TMSI mod 1024}.

2) The UE then determines the paging frame where the paging frame is theradio frame having the SFN equal to ‘SFN of reference frame+offset’. TheParameter Offset is signalled by the gNB in the system information(330). The offset is in units of the radio frames.

For example, if the determined reference frame is SFN ‘X’ and the offsetsignalled by the network is ‘Y’, the paging frame is the radio framewere the SFN equals X+Y.

The paging frame is the radio frame with respect to which the UEdetermines the PO. A PO associated with a PF may start in the PF orafter the PF. A PO which starts in a paging frame may end in asubsequent radio frame. The UE then calculates an index i_s (340), wherei_s is derived from the following Equation 8:i_s=floor(UE_ID/N)mod Ns, where  Equation 8

Ns: Number of POs corresponding to or associated with a PF. Ns*Nindicates the total number of POs in DRX cycle. The parameter Ns issignaled by the gNB in the system information.

N: T/PF Interval

In an example, the UE_ID can be {IMSI mod 1024} or {5G-S-TMSI mod 1024}.

The UE monitors the PO indicated by i_s (350). If i_s=0, the UE monitorsthe 1st PO; If i_s=1, the UE monitors the 2nd PO; If i_s=2, the UEmonitors the 3rd PO; and so on . . . .

The UE determines the PDCCH monitoring occasions corresponding to the POindicated by i_s as follows:

Option 1: the Paging Search Space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space.

The gNB may signal paging search space configuration (comprising atleast one of parameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration). The UE determines a PDCCH monitoring occasion from the PDCCHmonitoring periodicity (Monitoring-periodicity-PDCCH-slot), the PDCCHmonitoring offset (Monitoring-offset-PDCCH-slot), and the PDCCHmonitoring pattern (Monitoring-symbols-PDCCH-within-slot) within a slot.The PDCCH monitoring occasions are there in the slots ‘x’ to x+duration,where the slot with number ‘x’ in a radio frame with number ‘y’satisfies the Equation 9:(y*(number of slots in a radio frame)+x−Monitoring-offset-PDCCH-slot)mod(Monitoring-periodicity-PDCCH-slot)=0;  Equation 9

The starting symbol of a PDCCH monitoring occasion in each slot havingthe PDCCH monitoring occasion is given byMonitoring-symbols-PDCCH-within-slot. The length (in symbols) of a PDCCHmonitoring occasion is given in the corset associated with the searchspace.

If the paging search space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space,based on paging search space configuration (comprising at least one ofparameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration), the UE knows the PDCCH monitoring occasions for paging in thedetermined PF and subsequent radio frames. The UE knows the 1st PDCCHmonitoring occasion for paging in the determined PF and also thesubsequent PDCCH monitoring occasions. It is to be noted that in case ofTDD cell, amongst PDCCH monitoring occasions configured by paging searchspace, PDCCH monitoring occasions which are not overlapping with ULsymbols are considered as valid PDCCH monitoring occasions for paging.These valid PDCCH monitoring occasions for paging are referred as PDCCHmonitoring occasions for paging in further description.

The PDCCH monitoring occasions starting from the 1st PDCCH monitoringoccasion for paging in the paging frame is sequentially numbered from 0.The maximum number (L) of SSBs per frequency band is pre-defined. ThegNB signals the information (SSBPositionsInBurst) related to actualtransmitted SSBs in the system information.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 1. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the PF) issequentially numbered from 1. The maximum number (L) of SSBs perfrequency band is pre-defined. The gNB signals the information(SSBPositionsInBurst) related to the actual transmitted SSBs in thesystem information.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging;

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) is sequentially numbered from 0. The first PDCCH monitoringoccasion number for each PO can be signaled by the gNB. For example, ifNs is equal to 4, then the i_s values will be 0 to 3 and there are fourPOs. The gNB can signal the PDCCH monitoring occasion numbers (P, Q, R,S) one corresponding to each of the POs.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom Q-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom R-^(th) PDCCH monitoring occasions for paging.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom S-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information. In anembodiment, each PO can comprise of ‘R’ sub POs where each sub POconsists of ‘X’ PDCCH monitoring occasions, X is number of SSBs; in oneembodiment X is maximum number of SSBs i.e. L; in another embodiment Xis equal to actual transmitted SSBs. The number of sub POs i.e. R isalso signaled by gNB. In its PO (identified by PO index) UE may monitorone or more sub POs. The starting PDCCH monitoring occasion number ofeach of these sub POs of a PO is signaled by gNB. Alternatley, an offset‘0’ can be signaled between the sub POs. The starting PDCCH occasionsnumber of 1st sub PO is the starting PDCCH occasions number of PO. Let'ssay starting PDCCH monitoring occasion number of PO is P and offset isO. 1^(st) sub PO is a set of X consecutive PDCCH monitoring occasionsstarting from Pth PDCCH monitoring occasions for paging. 2^(nd) sub POis a set of X consecutive PDCCH monitoring occasions starting from(P+X+O)th PDCCH monitoring occasion for paging. 3^(rd) sub PO is a setof X consecutive PDCCH monitoring occasions starting from (P+2X+2O)thPDCCH monitoring occasion for paging and so on.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe is sequentially numbered from 0. The first PDCCH monitoringoccasion number for the first PO can be signaled by the gNB. The gNB canalso signal an offset between the starting PDCCH monitoring occasion ofeach PO. For example, if Ns is equal to 4, then the i_s values will be 0to 3 and there are four POs. The gNB can signal the PDCCH monitoringoccasion number (P) of the first PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+O)-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2O)-^(th) PDCCH monitoring occasions for paging.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3O)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) is sequentially numbered from 0. The first PDCCH monitoringoccasion number for the first PO can be signaled by the gNB. The gNB canalso signal an offset between a last PDCCH monitoring occasion of a POand starting PDCCH monitoring occasion of a next PO. For example, if Nsis equal to 4, then the i_s values will be 0 to 3 and there are fourPOs. The gNB can signal the PDCCH monitoring occasion number (P) of thefirst PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+X+O)-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2X+2O)-^(th) PDCCH monitoring occasions for paging.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3X+3O)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the slot index for the first PO can be signaled by the gNB.The gNB can also signal an offset between the starting slot of each PO.For example, if Ns is equal to 4, then the i_s values will be 0 to 3 andthere are four POs. The gNB can signal slot index (S) of the first POand an offset O.

A 1^(st) PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S of the paging frame.

A 2^(nd) PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S+O.

A 3^(rd) PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S+2O.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S+3O and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 2: The Paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space

The UE determines the RMSI pattern from the RMSI configuration signaledby the gNB.

If the RMSI pattern is 2 or 3

-   -   A 1^(st) PO is the set of PDCCH monitoring occasions for the        RMSI in a 1st half frame of the determined PF, and    -   A 2^(nd) PO is the set of PDCCH monitoring occasions for the        RMSI in a 2nd half frame of the determined PF.

If RMSI pattern is 1

-   -   A 1^(st) PO is the set of PDCCH monitoring occasions for the        RMSI, wherein the 1^(st) PDCCH monitoring occasion starts in the        determined PF.

Option 3: The paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space.

If the paging search space is not configured by the gNB, the PDCCHmonitoring occasions for paging are the same as the PDCCH monitoringoccasions for the RMSI. Based on the RMSI configuration, the UE knowsthe PDCCH monitoring occasions for paging in the determined PF andsubsequent radio frames. The UE knows the 1st PDCCH monitoring occasionfor paging in the PF and also the subsequent PDCCH monitoring occasionsfor paging.

The PDCCH monitoring occasions starting from the 1st PDCCH monitoringoccasion for paging in the paging frame is sequentially numbered from 0.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0th PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions starting from the 1st PDCCHmonitoring occasion for paging in the paging frame (or from the start ofthe PF) is sequentially numbered from 1.

A 1^(st) PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasions for paging.

A 2^(nd) PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 4: Subframes or slots corresponding to each PO are pre-defined asm LTE.

Embodiment 4

FIG. 4 illustrates another example of determining PO according to anembodiment of the disclosure.

Referring to FIG. 4:

0) The UE acquires the paging configuration (Default DRX Cycle Duration,PF Interval, Ns, Offset), the paging search space configuration (ifsignaled by the network) and the RMSI configuration (RMSI search space,RMSI pattern info: Pattern 1, 2, 3) from the system information signaledby the network (410). The RMSI is also be referred as SIB1. The RMSIpattern is also referred as the SS/PBCH block a nd the CORESETmultiplexing pattern. In the RRC Connected State, the paging searchspace configuration is signaled by the network for one or moreconfigured BWP(s) in dedicated signaling and the UE uses the pagingsearch space configuration of its active DL BWP.

1) The UE first derives a Paging frame (420). The paging frame is theradio frame with an SFN which satisfies the following Equation 10:(SFN+offset)mod T=(PF Interval)*(UE_ID mod N)  Equation 10

Where,

T: DRX cycle of the UE. T is determined by the shortest of the UEspecific DRX values, if configured by the RRC or by the upper layers(e.g. NAS), and a default DRX value signaled in the system information.If the UE specific DRX is not configured by the RRC or by the upperlayers, the default value is applied.

PF Interval: Interval at which the PF is present in the DRX cycle. ThePF interval is signaled by the gNB in the system information. The unitof the PF interval is in a radio frame.

N: T/PF Interval

In an example, the UE_ID can be {IMSI mod 1024} or {5G-S-TMSI mod 1024}.

The paging frame is the radio frame with respect to which the UEdetermines its PO. A PO associated with a PF may start in the PF orafter the PF. A PO which starts in the paging frame may end in asubsequent radio frame.

2) The UE then calculates an index i_s (430), where i_s is derived fromthe following Equation 11:i_s=floor(UE_ID/N)mod Ns, where  Equation 11

Ns: Number of POs. Ns is the number of POs corresponding to orassociated with a PF. Ns*N indicates total number of the POs in the DRXcycle. The parameter Ns is signaled by the gNB in the systeminformation.

N: T/PF Interval

In an example, the UE_ID can be {IMSI mod 1024} or {5G-S-TMSI mod 1024}.

3) The UE monitors the PO indicated by i_s (440). If i_s=0, the UEmonitors the 1st PO; If i_s=1, the UE monitors the 2nd PO; If i_s=2, theUE monitors the 3rd PO; and so on.

4) The UE determines the PDCCH monitoring occasions corresponding to thePO indicated by i_s as follows:

Option 1: A Paging Search Space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space.

The gNB may signal the paging search space configuration (comprising atleast one of parameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration). UE determines a PDCCH monitoring occasion from the PDCCHmonitoring periodicity (Monitoring-periodicity-PDCCH-slot), the PDCCHmonitoring offset (Monitoring-offset-PDCCH-slot), and the PDCCHmonitoring pattern (Monitoring-symbols-PDCCH-within-slot) within a slot.The PDCCH monitoring occasions are there in the slots ‘x’ to x+duration,where the slot with number ‘x’ in a radio frame with number ‘y’satisfies the Equation 12:(y*(number of slots in a radio frame)+x−Monitoring-offset-PDCCH-slot)mod(Monitoring-periodicity-PDCCH-slot)=0;  Equation 12

The starting symbol of a PDCCH monitoring occasion in each slot havingthe PDCCH monitoring occasion is given byMonitoring-symbols-PDCCH-within-slot. The length (in symbols) of a PDCCHmonitoring occasion is given by the coreset associated with the searchspace.

If the paging search space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space,based on the paging search space configuration (comprising at least oneof parameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration), the UE knows the PDCCH monitoring occasions for paging in thedetermined PF and the subsequent radio frames. The UE knows the 1stPDCCH monitoring occasion for paging in the determined PF and also thesubsequent PDCCH monitoring occasions.

The PDCCH monitoring occasions for paging from the start of determinedPF are sequentially numbered from 0. In other words, the PDCCHmonitoring occasions starting from the 1^(st) PDCCH monitoring occasionfor paging in the paging frame (or from the start of the PF) issequentially numbered from 0. The maximum number (L) of SSBs perfrequency band is pre-defined. The gNB signals the information(SSBPositionsInBurst) related to the actual transmitted SSBs in thesystem information.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 1. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the PF) issequentially numbered from 1. The maximum number (L) of SSBs perfrequency band is pre-defined. The gNB signals the information(SSBPositionsInBurst) related to the actual transmitted SSBs in thesystem information.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information. In anembodiment, each PO can comprise of ‘R’ sub POs where each sub POconsists of ‘X’ PDCCH monitoring occasions, X is number of SSBs; in oneembodiment X is maximum number of SSBs i.e. L; in another embodiment Xis equal to actual transmitted SSBs. The number of sub POs i.e. R isalso signaled by gNB. In its PO (identified by PO index) UE may monitorone or more sub POs. The starting PDCCH monitoring occasion number ofeach of these sub POs of a PO is signaled by gNB. Alternatley, an offset‘0’ can be signaled between the sub POs. The starting PDCCH occasionsnumber of 1st sub PO is the starting PDCCH occasions number of PO. Let'ssay starting PDCCH monitoring occasion number of PO is P and offset isO. 1^(st) sub PO is a set of X consecutive PDCCH monitoring occasionsstarting from Pth PDCCH monitoring occasions for paging. 2^(nd) sub POis a set of X consecutive PDCCH monitoring occasions starting from(P+X+O)th PDCCH monitoring occasion for paging. 3^(rd) sub PO is a setof X consecutive PDCCH monitoring occasions starting from (P+2X+2O)thPDCCH monitoring occasion for paging and so on.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) is sequentially numbered from 0. The first PDCCH monitoringoccasion number for each PO can be signaled by the gNB. For example, ifNs is equal to 4, then the i_s values will be 0 to 3 and there are fourPOs. The gNB can signal the PDCCH monitoring occasion numbers (P, Q, R,S) one corresponding to each of the POs.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom Q-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom R-^(th) PDCCH monitoring occasions for paging.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom S-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame is sequentially numbered from 0.The first PDCCH monitoring occasion number for the first PO can besignaled by the gNB. The gNB can also signal an offset between thestarting PDCCH monitoring occasion of each PO. For example, if Ns isequal to 4, then the i_s values will be 0 to 3 and there are four POs.The gNB can signal the PDCCH monitoring occasion number (P) of the firstPO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+O)-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2O)-^(th) PDCCH monitoring occasions for paging.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3O)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) is sequentially numbered from 0. The first PDCCH monitoringoccasion number for the first PO can be signaled by the gNB. The gNB canalso signal an offset between a last PDCCH monitoring occasion of a POand a starting PDCCH monitoring occasion of a next PO. For example, ifNs is equal to 4, then the i_s values will be 0 to 3 and there are fourPOs. The gNB can signal the PDCCH monitoring occasion number (P) of thefirst PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+X+O)-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2X+2O)-^(th) PDCCH monitoring occasions for paging.

A 4th PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3X+3O)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the slot index for the first PO can be signaled by the gNB.The gNB can also signal an offset between a starting slot of each PO.For example, if Ns is equal to 4, then the i_s values will be 0 to 3 andthere are four POs. The gNB can signal slot index (S) of the first POand an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S of paging frame.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S+O.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S+2O.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S+3O and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 2: A paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space

The UE determines the RMSI pattern from the RMSI configuration signaledby the gNB.

If RMSI pattern is 2 or 3

-   -   A 1^(st) PO is the set of PDCCH monitoring occasions for the        RMSI in a 1^(st) half frame of the determined PF,    -   A 2^(nd) PO is the set of PDCCH monitoring occasions for the        RMSI in 2^(nd) half frame of the determined PF.

If RMSI pattern is 1

-   -   A 1^(st) PO is the set of PDCCH monitoring occasions for the        RMSI, wherein the 1^(st) PDCCH monitoring occasion starts in        determined PF.

Option 3: A paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space. If thepaging search space with a search space Id zero is configured by thegNB, the PDCCH monitoring occasions for paging are the same as the PDCCHmonitoring occasions for the RMSI. Based on the RMSI configuration, theUE knows the PDCCH monitoring occasions for paging in the determined PFand the subsequent radio frames. The UE knows the 1st PDCCH monitoringoccasion for paging in the PF and also the subsequent PDCCH monitoringoccasions for paging.

The PDCCH monitoring occasions starting from the 1st PDCCH monitoringoccasion for paging in the paging frame (or from the start of the PF)are sequentially numbered from 0.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0-^(th) PDCCH monitoring occasions for paging.

2nd PO is set of X consecutive PDCCH monitoring occasions starting fromX-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions starting from the 1st PDCCHmonitoring occasion for paging in the paging frame (or from the start ofthe PF) is sequentially numbered from 1.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 4: Subframes or slots corresponding to each PO is pre-defined asin LTE.

Embodiment 5

FIG. 5 illustrates another example of determining PO according to anembodiment of the disclosure.

Referring to FIG. 5:

0) The UE acquires the paging configuration (Default DRX Cycle Duration,Num_PF, Ns, Offset), the paging search space configuration (if signaledby the network) and the RMSI configuration (RMSI search space, RMSIpattern info: Pattern 1, 2, 3) from the system information signaled bythe network (510). RMSI is also be referred as the SIB1. The RMSIpattern is also referred as the SS/PBCH block and CORESET multiplexingpattern. In the RRC Connected State, the paging search spaceconfiguration is signaled by the network for one or more configuredBWP(s) in dedicated signaling and the UE uses the paging search spaceconfiguration of its active DL BWP.

1) The UE first derives a reference radio frame (520). The referenceframe is the radio frame with the SFN which satisfies following Equation13:SFN mod T=(T div Num_PF)*(UE_ID mod Num_PF)  Equation 13

Where,

T: DRX cycle of the UE. T is determined by the shortest of the UEspecific DRX values, if configured by the RRC or by upper layers (e.g.NAS), and a default DRX value signaled in the system information. If theUE specific DRX is not configured by the RRC or by the upper layers, thedefault value is applied.

Num_PF: a number of paging frames in the DRX cycle. Num_PF is signaledby the gNB in the system information. The values of Num_PF can be T,T/2, T/4, T/8, T/16, T/32 and so on.

2) The UE then determines if the paging frame where the paging frame isthe radio frame having the SFN equal to ‘SFN of reference frame+offset’(530). The Parameter Offset is signalled by the gNB in the systeminformation. The offset is in units of the radio frames.

For example, if the determined reference frame is the SFN ‘X’ and theoffset signalled by the network is ‘Y’, the paging frame is the radioframe were the SFN equals X+Y.

The paging frame is the radio frame with respect to which the UEdetermines its PO. A PO associated with a PF may start in the PF orafter the PF. A PO which starts in the paging frame may end in asubsequent radio frame.

3) The UE then calculates an index i_s (540), where i_s is derived fromthe following Equation 14:i_s=floor(UE_ID/Num_PF)mod Ns, where  Equation 14

Ns: Number of POs corresponding to or associated with a PF. Ns*Num_PFindicates the total number of POs in DRX cycle. The parameter Ns issignaled by the gNB in the system information.

In an example, the UE_ID can be {IMSI mod 1024} or {5G-S-TMSI mod 1024}.

4) The UE monitors the PO indicated by i_s (550). If i_s=0, the UEmonitors the 1st PO; If i_s=1, the UE monitors the 2nd PO; If i_s=2, UEmonitors the 3rd PO; and so on . . . .

The UE determines the PDCCH monitoring occasions corresponding to the POindicated by i_s as follows:

Option 1: The Paging Search Space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space

The gNB may signal paging search space configuration (comprising atleast one of parameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration). UE determines a PDCCH monitoring occasion from the PDCCHmonitoring periodicity (Monitoring-periodicity-PDCCH-slot), the PDCCHmonitoring offset (Monitoring-offset-PDCCH-slot), and the PDCCHmonitoring pattern (Monitoring-symbols-PDCCH-within-slot) within a slot.The PDCCH monitoring occasions are there in the slots ‘x’ to x+duration,where the slot with number ‘x’ in a radio frame with number ‘y’satisfies the Equation 15:(y*(number of slots in a radio frame)+x−Monitoring-offset-PDCCH-slot)mod(Monitoring-periodicity-PDCCH-slot)=0;  Equation 15

The starting symbol of a PDCCH monitoring occasion in each slot havingthe PDCCH monitoring occasion is given byMonitoring-symbols-PDCCH-within-slot. The length (in symbols) of a PDCCHmonitoring occasion is given in the corset associated with the searchspace.

If the paging search space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space,based on the paging search space configuration (comprising at least oneof parameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration), the UE knows the PDCCH monitoring occasions for paging in thedetermined PF and the subsequent radio frames. The UE knows the 1stPDCCH monitoring occasion for paging in the determined PF and also thesubsequent PDCCH monitoring occasions.

The PDCCH monitoring occasions starting from the 1st PDCCH monitoringoccasion for paging in the paging frame (or from the start of the PF)are sequentially numbered from 0. The maximum number (L) of SSBs perfrequency band is pre-defined. The gNB signals the information(SSBPositionsInBurst) related to actual transmitted SSBs in the systeminformation.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 1. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the PF) issequentially numbered from 1. The maximum number (L) of SSBs perfrequency band is pre-defined. The gNB signals the information(SSBPositionsInBurst) related to actual transmitted SSBs in the systeminformation.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) is sequentially numbered from 0. The first PDCCH monitoringoccasion number for each PO can be signaled by the gNB. For example, ifNs is equal to 4, then the i_s values will be 0 to 3 and there are fourPOs. The gNB can signal the PDCCH monitoring occasion numbers (P, Q, R,S) one corresponding to each of the POs.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom Q-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom R-^(th) PDCCH monitoring occasions for paging.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom S-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information. In anembodiment, each PO can comprise of ‘R’ sub POs where each sub POconsists of ‘X’ PDCCH monitoring occasions, X is number of SSBs; in oneembodiment X is maximum number of SSBs i.e. L; in another embodiment Xis equal to actual transmitted SSBs. The number of sub POs i.e. R isalso signaled by gNB. In its PO (identified by PO index) UE may monitorone or more sub POs. The starting PDCCH monitoring occasion number ofeach of these sub POs of a PO is signaled by gNB. Alternatley, an offset‘O’ can be signaled between the sub POs. The starting PDCCH occasionsnumber of 1^(st) sub PO is the starting PDCCH occasions number of PO.Let's say starting PDCCH monitoring occasion number of PO is P andoffset is O. 1^(st) sub PO is a set of X consecutive PDCCH monitoringoccasions starting from Pth PDCCH monitoring occasions for paging.2^(nd) sub PO is a set of X consecutive PDCCH monitoring occasionsstarting from (P+X+O)th PDCCH monitoring occasion for paging. 3^(rd) subPO is a set of X consecutive PDCCH monitoring occasions starting from(P+2X+2O)th PDCCH monitoring occasion for paging and so on.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) is sequentially numbered from 0. The first PDCCH monitoringoccasion number for the first PO can be signaled by the gNB. The gNB canalso signal an offset between the starting PDCCH monitoring occasion ofeach PO. For example, if Ns is equal to 4, then the i_s values will be 0to 3 and there are four POs. The gNB can signal the PDCCH monitoringoccasion number (P) of the first PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th)PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+O)-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2O)-^(th) PDCCH monitoring occasions for paging.

An 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3O)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) are sequentially numbered from 0. The first PDCCH monitoringoccasion number for the first PO can be signaled by the gNB. The gNB canalso signal an offset between the last PDCCH monitoring occasion of a POand a starting PDCCH monitoring occasion of the next PO. For example, ifNs is equal to 4, then the i_s values will be 0 to 3 and there are fourPOs. The gNB can signal the PDCCH monitoring occasion number (P) of thefirst PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+X+O)-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2X+2O)-^(th) PDCCH monitoring occasions for paging.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3X+3O)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the slot index for the first PO can be signaled by the gNB.The gNB can also signal an offset between the starting slot of each PO.For example, if Ns is equal to 4, then the i_s values will be 0 to 3 andthere are four POs. The gNB can signal slot index (S) of the first POand an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S of paging frame.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S+O.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S+2O.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasion in slot S+3O and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 2: The Paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space.

The UE determines the RMSI pattern from the RMSI configuration signaledby the gNB.

If RMSI pattern is 2 or 3,

-   -   A 1^(st) PO is the set of PDCCH monitoring occasions for the        RMSI in the 1st half frame of the determined PF, and    -   A 2^(nd) PO is the set of PDCCH monitoring occasions for the        RMSI in the 2^(nd) half frame of the determined PF.

If RMSI pattern is 1,

A 1^(st) PO is the set of PDCCH monitoring occasions for the RMSI,wherein the 1^(st) PDCCH monitoring occasion starts in the determinedPF.

Option 3: The Paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space.

If the paging search space with the search space Id zero is configuredby the gNB, the PDCCH monitoring occasions for paging are same as thePDCCH monitoring occasions for the RMSI. Based on the RMSIconfiguration, the UE knows the PDCCH monitoring occasions for paging inthe determined PF and the subsequent radio frames. The UE knows the 1stPDCCH monitoring occasion for paging in the PF and also the subsequentPDCCH monitoring occasions for paging.

The PDCCH monitoring occasions starting from the 1st PDCCH monitoringoccasion for paging in the paging frame is sequentially numbered from 0.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, PDCCH monitoring occasions starting from the 1st PDCCHmonitoring occasion for paging in the paging frame (or from the start ofthe PF) is sequentially numbered from 1.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom the 1^(st) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 4: Subframes or slots corresponding to each PO is pre-defined asin LTE.

Embodiment 6

FIG. 6 illustrates another example of determining PO according to anembodiment of the disclosure.

Referring to FIG. 6:

0) The UE acquires the paging configuration (Default DRX Cycle Duration,Num_PF, Ns, Offset), the paging search space configuration (if signaledby the network) and the RMSI configuration (RMSI search space, RMSIpattern info: Pattern 1, 2, 3) from the system information signaled bythe network (610). The RMSI is also be referred as SIB1. The RMSIpattern is also referred as the SS/PBCH block a nd CORESET multiplexingpattern. In the RRC Connected State, the paging search spaceconfiguration is signaled by the network for one or more configuredBWP(s) in dedicated signaling and the UE uses the paging search spaceconfiguration of its active DL BWP.

1) The UE first derives a Paging frame (620). The paging frame is theradio frame with The SFN which satisfies following Equation 16:(SFN+offset)mod T=(T div Num_PF)*(UE_ID mod Num_PF)   Equation 16

Where,

T: DRX cycle of the UE. T is determined by the shortest of the UEspecific DRX values, if configured by the RRC or by the upper layers(e.g. NAS), and a default DRX value signaled in the system information.If the UE specific DRX is not configured by the RRC or by the upperlayers, the default value is applied.

Num_PF: number of paging frames in the DRX cycle. The Num_PF is signaledby the gNB in the system information. The values of the Num_PF can be T,T/2, T/4, T/8, T/16, T/32 and so on.

In an example, the UE_ID can be {IMSI mod 1024} or {5G-S-TMSI mod 1024}.

The paging frame is the radio frame with respect to which the UEdetermines its PO. A PO associated with a PF may start in the PF orafter the PF. A PO which starts in the paging frame may end in thesubsequent radio frame.

2) The UE then calculates an index i_s (630), where i_s is derived fromthe following Equation 17:i_s=floor(UE_ID/Num_PF)mod Ns, where  Equation 17

Ns: Ns*Num_PF indicates the total number of POs in DRX cycle. Theparameter Ns is signaled by the gNB in the system information.

In an example, the UE_ID can be {IMSI mod 1024} or {5G-S-TMSI mod 1024}.

3) The UE monitors the PO indicated by i_s (640). If i_s=0, the UEmonitors the 1st PO; If i_s=1, the UE monitors the 2nd PO; If i_s=2, theUE monitors the 3rd PO; and so on.

4) The UE determines the PDCCH monitoring occasions corresponding to thePO indicated by i_s as follows:

Option 1: The Paging Search Space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space.

The gNB may signal the paging search space configuration (comprising atleast one of parameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration). The UE determines a PDCCH monitoring occasion from the PDCCHmonitoring periodicity (Monitoring-periodicity-PDCCH-slot), the PDCCHmonitoring offset (Monitoring-offset-PDCCH-slot), and the PDCCHmonitoring pattern (Monitoring-symbols-PDCCH-within-slot) within a slot.The PDCCH monitoring occasions are there in the slots ‘x’ to x+duration,where the slot with number ‘x’ in a radio frame with number ‘y’satisfies the Equation 18:(y*(number of slots in a radio frame)+x−Monitoring-offset-PDCCH-slot)mod(Monitoring-periodicity-PDCCH-slot)=0;  Equation 18

The starting symbol of a PDCCH monitoring occasion in each slot havingthe PDCCH monitoring occasion is given byMonitoring-symbols-PDCCH-within-slot. The length (in symbols) of a PDCCHmonitoring occasion is given in the coreset associated with the searchspace.

If the paging search space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space,based on paging search space configuration (comprising at least one ofparameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration), the UE knows the PDCCH monitoring occasions for paging in thedetermined PF and subsequent radio frames. The UE knows the 1st PDCCHmonitoring occasion for paging in the determined PF and also thesubsequent PDCCH monitoring occasions.

The PDCCH monitoring occasions for paging from the start of thedetermined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the PF)are sequentially numbered from 0. The maximum number (L) of SSBs perfrequency band is pre-defined. The gNB signals the information(SSBPositionsInBurst) related to the actual transmitted SSBs in thesystem information.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 1. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the PF) issequentially numbered from 1. The maximum number (L) of SSBs perfrequency band is pre-defined. The gNB signals the information(SSBPositionsInBurst) related to the actual transmitted SSBs in thesystem information.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging; and soon.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) is sequentially numbered from 0. The first PDCCH monitoringoccasion number for each PO can be signaled by the gNB. For example, ifNs is equal to 4, then the i_s values will be 0 to 3 and there are fourPOs. The gNB can signal the PDCCH monitoring occasion numbers (P, Q, R,S) one corresponding to each of the POs.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom Q-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom R-^(th) PDCCH monitoring occasions for paging.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom S-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information. In anembodiment, each PO can comprise of ‘R’ sub POs where each sub POconsists of ‘X’ PDCCH monitoring occasions, X is number of SSBs; in oneembodiment X is maximum number of SSBs i.e. L; in another embodiment Xis equal to actual transmitted SSBs. The number of sub POs i.e. R isalso signaled by gNB. In its PO (identified by PO index) UE may monitorone or more sub POs. The starting PDCCH monitoring occasion number ofeach of these sub POs of a PO is signaled by gNB. Alternatley, an offset‘O’ can be signaled between the sub POs. The starting PDCCH occasionsnumber of 1st sub PO is the starting PDCCH occasions number of PO. Let'ssay starting PDCCH monitoring occasion number of PO is P and offset isO. 1^(st) sub PO is a set of X consecutive PDCCH monitoring occasionsstarting from Pth PDCCH monitoring occasions for paging. 2^(nd) sub POis a set of X consecutive PDCCH monitoring occasions starting from(P+X+O)th PDCCH monitoring occasion for paging. 3^(rd) sub PO is a setof X consecutive PDCCH monitoring occasions starting from (P+2X+2O)thPDCCH monitoring occasion for paging and so on.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) are sequentially numbered from 0. The first PDCCH monitoringoccasion number for the first PO can be signaled by the gNB. The gNB canalso signal an offset between the starting PDCCH monitoring occasion ofeach PO. For example, if Ns is equal to 4, then the i_s values will be 0to 3 and there are four POs. The gNB can signal the PDCCH monitoringoccasion number (P) of the first PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+O)-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2O)-^(th) PDCCH monitoring occasions for paging.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3O) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) are sequentially numbered from 0. The first PDCCH monitoringoccasion number for the first PO can be signaled by the gNB. The gNB canalso signal an offset between the last PDCCH monitoring occasion of a POand the starting PDCCH monitoring occasion of next PO. For example, ifNs is equal to 4, then the i_s values will be 0 to 3 and there are fourPOs. The gNB can signal the PDCCH monitoring occasion number (P) of thefirst PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+X+O)-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2X+2O)-^(th) PDCCH monitoring occasions for paging.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3X+3O)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the slot index for the first PO can be signaled by the gNB.The gNB can also signal an offset between the starting slot of each PO.For example, if Ns is equal to 4, then the i_s values will be 0 to 3 andthere are four POs. The gNB can signal slot index (S) of the first POand an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S of paging frame.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S+O.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S+2O.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S+3O and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 2: The Paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space.

The UE determines the RMSI pattern from the RMSI configuration signaledby the gNB.

If RMSI pattern is 2 or 3,

-   -   The 1st PO is the set of PDCCH monitoring occasions for the RMSI        in the 1st half frame of determined PF.    -   The 2nd PO is the set of PDCCH monitoring occasions for the RMSI        in the 2nd half frame of determined PF.

If RMSI pattern is 1,

-   -   The 1st PO is the set of PDCCH monitoring occasions for the        RMSI, wherein the 1st PDCCH monitoring occasion starts in the        determined PF.

Option 3: The Paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space.

If the paging search space with search space Id zero is configured bythe gNB, PDCCH monitoring occasions for paging are same as PDCCHmonitoring occasions for the RMSI. Based on the RMSI configuration, theUE knows the PDCCH monitoring occasions for paging in the determined PFand the subsequent radio frames. The UE knows the 1st PDCCH monitoringoccasion for paging in the PF and also the subsequent PDCCH monitoringoccasions for paging.

The PDCCH monitoring occasions starting from the 1st PDCCH monitoringoccasion for paging in the paging frame (or from the start of the PF)are sequentially numbered from 0.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information. In anembodiment, each PO can comprise of ‘R’ sub POs where each sub POconsists of ‘X’ PDCCH monitoring occasions, X is number of SSBs; in oneembodiment X is maximum number of SSBs i.e. L; in another embodiment Xis equal to actual transmitted SSBs. The number of sub POs i.e. R isalso signaled by gNB. In its PO (identified by PO index) UE may monitorone or more sub POs. The starting PDCCH monitoring occasion number ofeach of these sub POs of a PO is signaled by gNB. Alternatley, an offset‘0’ can be signaled between the sub POs. The starting PDCCH occasionsnumber of 1st sub PO is the starting PDCCH occasions number of PO. Let'ssay starting PDCCH monitoring occasion number of PO is P and offset isO. 1^(st) sub PO is a set of X consecutive PDCCH monitoring occasionsstarting from Pth PDCCH monitoring occasions for paging. 2nd sub PO is aset of X consecutive PDCCH monitoring occasions starting from (P+X+O)thPDCCH monitoring occasion for paging. 3^(rd) sub PO is a set of Xconsecutive PDCCH monitoring occasions starting from (P+2X+2O)th PDCCHmonitoring occasion for paging and so on.

Alternately, the PDCCH monitoring occasions starting from the 1st PDCCHmonitoring occasion for paging in the paging frame (or from the start ofthe PF) are sequentially numbered from 1.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging; and soon.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 4: Subframes or slots corresponding to each PO is pre-defined asin LTE.

Embodiment 7

FIG. 7 illustrates another example of determining according to anembodiment of the disclosure.

Referring to FIG. 7:

0) The UE acquires the paging configuration (Default DRX Cycle Duration,Num_PF, nB, Offset), the paging search space configuration (if signaledby the network) and the RMSI configuration (RMSI search space, RMSIpattern info: Pattern 1, 2, 3) from the system information signaled bythe network (710). The RMSI is also be referred as SIB1. The RMSIpattern is also referred as the SS/PBCH block a nd the CORESETmultiplexing pattern. In the RRC Connected State, the paging searchspace configuration is signaled by the network for one or moreconfigured BWP(s) in dedicated signaling and the UE uses the pagingsearch space configuration of its active DL BWP.

1) The UE first derives a reference radio frame (720). The referenceframe is the radio frame with the SFN which satisfies following Equation19:SFN mod T=(T div Num_PF)*(UE_ID mod Num_PF)  Equation 19

Where,

T: DRX cycle of the UE. T is determined by the shortest of the UEspecific DRX values, if configured by the RRC or by the upper layers(e.g. NAS), and a default DRX value signaled in the system information.If the UE specific DRX is not configured by the RRC or by the upperlayers, the default value is applied.

Num_PF: number of the paging frames in the DRX cycle. Num_PF is signaledby the gNB in the system information. The values of Num_PF can be T,T/2, T/4, T/8, T/16, T/32 and so on.

2) The UE then determines the paging frame, where the paging frame isthe radio frame having the SFN equal to ‘SFN of reference frame+offset’(730). The Parameter Offset is signalled by the gNB in the systeminformation. The Offset is in units of radio frames.

For example, if the determined reference frame is the SFN ‘X’ and theoffset signalled by the network is ‘Y’, the paging frame is the radioframe were the SFN equals X+Y.

The Paging frame is the radio frame with respect to which the UEdetermines its PO. A PO associated with a PF may start in the PF orafter the PF. A PO which starts in the paging frame may end in thesubsequent radio frame.

3) The UE then calculates an index i_s (740), where i_s is derived fromthe following Equation 20:i_s=floor(UE_ID/Num_PF)mod Ns, where  Equation 20

Ns: nB/Num_PF. Ns*Num_PF indicates the total number of POs in DRX cycle.

nB: Total number of POs in DRX cycle.

In an example, the UE_ID can be {IMSI mod 1024} or {5G-S-TMSI mod 1024}.

4) The UE monitors the PO indicated by i_s (750). If i_s=0, the UEmonitors the 1st PO; If i_s=1, the UE monitors the 2nd PO; If i_s=2, theUE monitors the 3rd PO; and so on.

5) The UE determines the PDCCH monitoring occasions corresponding to thePO indicated by i_s as follows:

Option 1: The Paging Search Space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space

The gNB may signal paging search space configuration (comprising atleast one of parameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration). The UE determines a PDCCH monitoring occasion from the PDCCHmonitoring periodicity (Monitoring-periodicity-PDCCH-slot), the PDCCHmonitoring offset (Monitoring-offset-PDCCH-slot), and the PDCCHmonitoring pattern (Monitoring-symbols-PDCCH-within-slot) within a slot.The PDCCH monitoring occasions are there in the slots ‘x’ to x+duration,where the slot with number ‘x’ in a radio frame with number ‘y’satisfies the Equation 21:(y*(number of slots in a radio frame)+x−Monitoring-offset-PDCCH-slot)mod(Monitoring-periodicity-PDCCH-slot)=0;  Equation 21

The starting symbol of a PDCCH monitoring occasion in each slot havingPDCCH monitoring occasion is given byMonitoring-symbols-PDCCH-within-slot. The length (in symbols) of a PDCCHmonitoring occasion is given in the corset associated with the searchspace.

If the paging search space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space,based on paging search space configuration (comprising at least one ofparameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration), the UE knows the PDCCH monitoring occasions for paging in thedetermined PF and the subsequent radio frames. The UE knows the 1stPDCCH monitoring occasion for paging in the determined PF and also thesubsequent PDCCH monitoring occasions.

The PDCCH monitoring occasions for paging from the start of thedetermined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the PF) issequentially numbered from 0. The maximum number (L) of SSBs perfrequency band is pre-defined. The gNB signals the information(SSBPositionsInBurst) related to the actual transmitted SSBs in thesystem information.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 1. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of PF) aresequentially numbered from 1. The maximum number (L) of SSBs perfrequency band is pre-defined. The gNB signals the information(SSBPositionsInBurst) related to actual transmitted SSBs in the systeminformation.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) are sequentially numbered from 0. The first PDCCH monitoringoccasion number for each PO can be signaled by the gNB. For example, ifNs is equal to 4, then the i_s values will be 0 to 3 and there are fourPOs. The gNB can signal the PDCCH monitoring occasion numbers (P, Q, R,S) one corresponding to each of the POs.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom Q-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom R-^(th) PDCCH monitoring occasions for paging.

A 4th PO is set of X consecutive PDCCH monitoring occasions startingfrom S-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information. In anembodiment, each PO can comprise of ‘R’ sub POs where each sub POconsists of ‘X’ PDCCH monitoring occasions, X is number of SSBs; in oneembodiment X is maximum number of SSBs i.e. L; in another embodiment Xis equal to actual transmitted SSBs. The number of sub POs i.e. R isalso signaled by gNB. In its PO (identified by PO index) UE may monitorone or more sub POs. The starting PDCCH monitoring occasion number ofeach of these sub POs of a PO is signaled by gNB. Alternatley, an offset‘0’ can be signaled between the sub POs. The starting PDCCH occasionsnumber of 1st sub PO is the starting PDCCH occasions number of PO. Let'ssay starting PDCCH monitoring occasion number of PO is P and offset isO. 1^(st) sub PO is a set of X consecutive PDCCH monitoring occasionsstarting from Pth PDCCH monitoring occasions for paging. 2^(nd) sub POis a set of X consecutive PDCCH monitoring occasions starting from(P+X+O)th PDCCH monitoring occasion for paging. 3^(rd) sub PO is a setof X consecutive PDCCH monitoring occasions starting from (P+2X+2O)thPDCCH monitoring occasion for paging and so on.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) are sequentially numbered from 0. The first PDCCH monitoringoccasion number for the first PO can be signaled by the gNB. The gNB canalso signal an offset between the starting PDCCH monitoring occasion ofeach PO. For example, if Ns is equal to 4, then the i_s values will be 0to 3 and there are four POs. The gNB can signal the PDCCH monitoringoccasion number (P) of the first PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+O)-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2O)-^(th) PDCCH monitoring occasions for paging.

An 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3O)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) are sequentially numbered from 0. The first PDCCH monitoringoccasion number for the first PO can be signaled by the gNB. The gNB canalso signal an offset between the last PDCCH monitoring occasion of a POand a starting PDCCH monitoring occasion of the next PO. For example, ifNs is equal to 4, then the i_s values will be 0 to 3 and there are fourPOs. The gNB can signal the PDCCH monitoring occasion number (P) of thefirst PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+X+O)-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2X+2O)-^(th) PDCCH monitoring occasions for paging.

A 4th PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3X+3O)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the slot index for first PO can be signaled by the gNB. ThegNB can also signal an offset between the starting slot of each PO. Forexample, if Ns is equal to 4, then the i_s values will be 0 to 3 andthere are four POs. The gNB can signal slot index (S) of the first POand an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S of paging frame.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S+O.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S+2O.

A 4th PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S+3O and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 2: The Paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space. The UEdetermines the RMSI pattern from the RMSI configuration signaled by thegNB.

If RMSI pattern is 2 or 3,

-   -   A 1st PO is the set of PDCCH monitoring occasions for the RMSI        in the 1^(st) half frame of the determined PF.    -   A 2nd PO is the set of PDCCH monitoring occasions for the RMSI        in the 2^(nd) half frame of the determined PF.

If RMSI pattern is 1,

-   -   A 1^(st) PO is the set of PDCCH monitoring occasions for the        RMSI, wherein the 1^(st) PDCCH monitoring occasion starts in the        determined PF.

Option 3: The Paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space

If the paging search space with the search space Id zero is configuredby the gNB, the PDCCH monitoring occasions for paging are same as thePDCCH monitoring occasions for the RMSI. Based on the RMSIconfiguration, the UE knows the PDCCH monitoring occasions for paging inthe determined PF and the subsequent radio frames. The UE knows the 1stPDCCH monitoring occasion for paging in the PF and also the subsequentPDCCH monitoring occasions for paging.

The PDCCH monitoring occasions starting from the 1st PDCCH monitoringoccasion for paging in the paging frame (or from the start of PF) aresequentially numbered from 0.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions starting from the 1st PDCCHmonitoring occasion for paging in the paging frame (or from the start ofthe PF) are sequentially numbered from 1.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging.

ith PO is set of X consecutive PDCCH monitoring occasions starting from[(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 4: Subframes or slots corresponding to each PO is pre-defined asin LTE.

Embodiment 8

FIG. 8 illustrates another example of determining PO according to anembodiment of the disclosure.

Referring to FIG. 8:

0) The UE acquires the paging configuration (Default DRX Cycle Duration,Num_PF, nB, Offset), the paging search space configuration (if signaledby the network) and the RMSI configuration (RMSI search space, RMSIpattern info: Pattern 1, 2, 3) from the system information signaled bythe network (810). The RMSI is also be referred as SIB1. The RMSIpattern is also referred as the SS/PBCH block a nd CORESET multiplexingpattern. In the RRC Connected State, the paging search spaceconfiguration is signaled by the network for one or more configuredBWP(s) in the dedicated signaling and the UE uses the paging searchspace configuration of its active DL BWP.

1) The UE first derives a Paging frame (820). The paging frame is theradio frame with the SFN which satisfies Equation 22:(SFN+offset)mod T=(T div Num_PF)*(UE_ID mod Num_PF)   Equation 22

Where,

T: DRX cycle of the UE. T is determined by the shortest of the UEspecific DRX values, if configured by the RRC or by the upper layers(e.g. NAS), and a default DRX value signaled in the system information.If the UE specific DRX is not configured by the RRC or by the upperlayers, the default value is applied.

Num_PF: the number of paging frames in the DRX cycle. The Num_PF issignaled by the gNB in the system information. The values of the Num_PFcan be T, T/2, T/4, T/8, T/16, T/32 and so on.

In an example, the UE_ID can be {IMSI mod 1024} or {5G-S-TMSI mod 1024}.

The paging frame is the radio frame with respect to which the UEdetermines its PO. A PO associated with a PF may start in the PF orafter the PF. A PO which starts in the paging frame may end in thesubsequent radio frame.

2) The UE then calculates an index i_s (830), where i_s is derived fromthe following Equation 23:i_s=floor(UE_ID/Num_PF)mod Ns, where  Equation 23

Ns: nB/Num_PF. Ns*Num_PF indicates the total number of POs in DRX cycle.

nB: Total number of POs in DRX cycle.

In an example, the UE_ID can be {IMSI mod 1024} or {5G-S-TMSI mod 1024}.

3) The UE monitors the PO indicated by i_s (840). If i_s=0, the UEmonitors the 1st PO; If i_s=1, the UE monitors the 2nd PO; If i_s=2, theUE monitors the 3rd PO; and so on.

4) The UE determines the PDCCH monitoring occasions corresponding to thePO indicated by i_s as follows:

Option 1: The Paging Search Space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space

The gNB may signal the paging search space configuration (comprising atleast one of parameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration). The UE determines a PDCCH monitoring occasion from the PDCCHmonitoring periodicity (Monitoring-periodicity-PDCCH-slot), the PDCCHmonitoring offset (Monitoring-offset-PDCCH-slot), and the PDCCHmonitoring pattern (Monitoring-symbols-PDCCH-within-slot) within a slot.The PDCCH monitoring occasions are there in the slots ‘x’ to x+duration,where the slot with number ‘x’ in a radio frame with number ‘y’satisfies the Equation 24:(y*(number of slots in a radio frame)+x−Monitoring-offset-PDCCH-slot)mod(Monitoring-periodicity-PDCCH-slot)=0;  Equation 24

The starting symbol of a PDCCH monitoring occasion in each slot havingthe PDCCH monitoring occasion is given byMonitoring-symbols-PDCCH-within-slot. The length (in symbols) of a PDCCHmonitoring occasion is given in the corset associated with the searchspace.

If the paging search space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space,based on the paging search space configuration (comprising at least oneof parameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration), the UE knows the PDCCH monitoring occasions for paging in thedetermined PF and the subsequent radio frames. The UE knows the 1stPDCCH monitoring occasion for paging in the determined PF and also thesubsequent PDCCH monitoring occasions.

The PDCCH monitoring occasions for paging from the start of thedetermined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of PF) aresequentially numbered from 0. The maximum number (L) of SSBs perfrequency band is pre-defined. The gNB signals the information(SSBPositionsInBurst) related to actual transmitted SSBs in the systeminformation.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 1. In other words, thePDCCH monitoring occasions starting from the 1st PDCCH monitoringoccasion for paging in the paging frame (or from the start of PF) aresequentially numbered from 1. The maximum number (L) of SSBs perfrequency band is pre-defined. The gNB signals the information(SSBPositionsInBurst) related to the actual transmitted SSBs in thesystem information.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging and so on.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) is sequentially numbered from 0. The first PDCCH monitoringoccasion number for each PO can be signaled by the gNB. For example, ifNs is equal to 4, then the i_s values will be 0 to 3 and there are fourPOs. The gNB can signal PDCCH monitoring occasion numbers (P, Q, R, S)one corresponding to each of the POs.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom Q-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom R-^(th) PDCCH monitoring occasions for paging.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom S-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information. In anembodiment, each PO can comprise of ‘R’ sub POs where each sub POconsists of ‘X’ PDCCH monitoring occasions, X is number of SSBs; in oneembodiment X is maximum number of SSBs i.e. L; in another embodiment Xis equal to actual transmitted SSBs. The number of sub POs i.e. R isalso signaled by gNB. In its PO (identified by PO index) UE may monitorone or more sub POs. The starting PDCCH monitoring occasion number ofeach of these sub POs of a PO is signaled by gNB. Alternatley, an offset‘O’ can be signaled between the sub POs. The starting PDCCH occasionsnumber of 1^(st) sub PO is the starting PDCCH occasions number of PO.Let's say starting PDCCH monitoring occasion number of PO is P andoffset is O. 1^(st) sub PO is a set of X consecutive PDCCH monitoringoccasions starting from Pth PDCCH monitoring occasions for paging.2^(nd) sub PO is a set of X consecutive PDCCH monitoring occasionsstarting from (P+X+O)th PDCCH monitoring occasion for paging. 3rd sub POis a set of X consecutive PDCCH monitoring occasions starting from(P+2X+2O)th PDCCH monitoring occasion for paging and so on.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) are sequentially numbered from 0. The first PDCCH monitoringoccasion number for the first PO can be signaled by the gNB. The gNB canalso signal an offset between the starting PDCCH monitoring occasion ofeach PO. For example, if Ns is equal to 4, then the i_s values will be 0to 3 and there are four POs. The gNB can signal the PDCCH monitoringoccasion number (P) of the first PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+O)-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2O)-^(th) PDCCH monitoring occasions for paging.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3O) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) are sequentially numbered from 0. The first PDCCH monitoringoccasion number for the first PO can be signaled by the gNB. The gNB canalso signal an offset between the last PDCCH monitoring occasion of a POand starting the PDCCH monitoring occasion of the next PO. For example,if Ns is equal to 4, then the i_s values will be 0 to 3 and there arefour POs. The gNB can signal the PDCCH monitoring occasion number (P) ofthe first PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+X+O)-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2X+2O)-^(th) PDCCH monitoring occasions for paging.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3X+3O)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs.

In an embodiment, whether X is the actual transmitted SSBs or not can beindicated by the network in the system information.

Alternately, the slot index for first PO can be signaled by the gNB. ThegNB can also signal an offset between the starting slot of each PO. Forexample, if Ns is equal to 4, then the i_s values will be 0 to 3 andthere are four POs. The gNB can signal slot index (S) of the first POand an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S of paging frame.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S+O.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S+2O.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S+3O and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 2: The paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space

The UE determines the RMSI pattern from the RMSI configuration signaledby the gNB.

If RMSI pattern is 2 or 3,

The 1st PO is the set of PDCCH monitoring occasions for the RMSI in the1^(st) half frame of the determined PF.

-   -   The 2^(nd) PO is the set of PDCCH monitoring occasions for the        RMSI in the 2^(nd) half frame of the determined PF.

If RMSI pattern is 1,

-   -   A 1^(st) PO is the set of PDCCH monitoring occasions for the        RMSI, wherein the 1^(st) PDCCH monitoring occasion starts in the        determined PF.

Option 3: The paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space

If the paging search space with the search space Id zero is configuredby the gNB, the PDCCH monitoring occasions for paging are same as thePDCCH monitoring occasions for the RMSI. Based on the RMSIconfiguration, the UE knows the PDCCH monitoring occasions for paging inthe determined PF and the subsequent radio frames. The UE knows the 1stPDCCH monitoring occasion for paging in the PF and also the subsequentPDCCH monitoring occasions for paging.

The PDCCH monitoring occasions starting from the 1st PDCCH monitoringoccasion for paging in the paging frame (or from the start of PF) aresequentially numbered from 0.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions starting from the 1st PDCCHmonitoring occasion for paging in the paging frame (or from the start ofPF) are sequentially numbered from 1.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 4: Subframes or slots corresponding to each PO is pre-defined asin LTE.

Embodiment 9

FIG. 9 illustrates another example of determining PO according to anembodiment of the disclosure.

Referring to FIG. 9:

0) The UE acquires the paging configuration (Default DRX Cycle Duration,Ns, nB, Offset), the paging search space configuration (if signaled bythe network) and the RMSI configuration (RMSI search space, RMSI patterninfo: Pattern 1, 2, 3) from the system information signaled by thenetwork (910). The RMSI is also be referred as SIB1. The RMSI pattern isalso referred as the SS/PBCH block and the CORESET multiplexing pattern.In the RRC Connected State, the paging search space configuration issignaled by the network for one or more configured BWP(s) in dedicatedsignaling and the UE uses the paging search space configuration of itsactive DL BWP.

1) The UE first derives a reference radio frame (920). The referenceframe is the radio frame with the SFN which satisfies following Equation25:SFN mod T=(T div N)*(UE_ID mod N)  Equation 25

Where,

T: DRX cycle of the UE. T is determined by the shortest of the UEspecific DRX values, if configured by the RRC or by the upper layers(e.g. NAS), and a default DRX value signaled in the system information.If the UE specific DRX is not configured by the RRC or by upper layers,the default value is applied.

nB: number of POs in DRX cycle. nB is signaled by the gNB in the systeminformation. The values of nB can be 4T, 2T, T, T/2, T/4, T/8, T/16,T/32 and so on.

N: nB/Ns

2) The UE then determines the paging frame, where the paging frame isthe radio frame having the SFN equal to ‘SFN of reference frame+offset’(930). The Parameter Offset is signalled by the gNB in the systeminformation. The offset is in units of the radio frames.

For example, if the determined reference frame is SFN ‘X’ and the offsetsignalled by the network is ‘Y’, paging frame is the radio frame wherethe SFN equals X+Y.

The paging frame is the radio frame with respect to which the UEdetermines its PO. A PO associated with a PF may start in the PF orafter the PF. A PO which starts in the paging frame may end in thesubsequent radio frame.

3) The UE then calculates an index i_s (940), where i_s is derived fromthe following Equation 26:i_s=floor(UE_ID/N)mod Ns, where  Equation 26

N=nB/Ns

In an example, the UE_ID can be {IMSI mod 1024} or {5G-S-TMSI mod 1024}.

4) The UE monitors the PO indicated by i_s (950). If i_s=0, the UEmonitors the 1st PO; If i_s=1, the UE monitors the 2nd PO; If i_s=2, theUE monitors the 3rd PO; and so on.

5) The UE determines the PDCCH monitoring occasions corresponding to thePO indicated by i_s as follows:

Option 1: The Paging Search Space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space

The gNB may signal the paging search space configuration (comprising atleast one of parameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration). The UE determines a PDCCH monitoring occasion from the PDCCHmonitoring periodicity (Monitoring-periodicity-PDCCH-slot), the PDCCHmonitoring offset (Monitoring-offset-PDCCH-slot), and the PDCCHmonitoring pattern (Monitoring-symbols-PDCCH-within-slot) within a slot.PDCCH monitoring occasions are there in slots ‘x’ to x+duration, wherethe slot with the number ‘x’ in a radio frame with number ‘y’ satisfiesthe Equation 27:(y*(number of slots in a radio frame)+x−Monitoring-offset-PDCCH-slot)mod(Monitoring-periodicity-PDCCH-slot)=0;  Equation 27

The starting symbol of a PDCCH monitoring occasion in each slot havingthe PDCCH monitoring occasion is given byMonitoring-symbols-PDCCH-within-slot. The length (in symbols) of a PDCCHmonitoring occasion is given in the corset associated with the searchspace.

If the paging search space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space,based on paging search space configuration (comprising at least one ofparameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration), the UE knows the PDCCH monitoring occasions for paging in thedetermined PF and the subsequent radio frames. The UE knows the 1stPDCCH monitoring occasion for paging in the determined PF and also thesubsequent PDCCH monitoring occasions.

The PDCCH monitoring occasions for paging from the start of thedetermined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame is sequentially numbered from 0.The maximum number (L) of SSBs per frequency band is pre-defined. ThegNB signals the information (SSBPositionsInBurst) related to actualtransmitted SSBs in the system information.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment X, is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 1. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of PF) issequentially numbered from 1. The maximum number (L) of SSBs perfrequency band is pre-defined. The gNB signals the information(SSBPositionsInBurst) related to the actual transmitted SSBs in thesystem information.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) is sequentially numbered from 0. The first PDCCH monitoringoccasion number for each PO can be signaled by the gNB. For example, ifNs is equal to 4, then the i_s values will be 0 to 3 and there are fourPOs. The gNB can signal the PDCCH monitoring occasion numbers (P, Q, R,S) one corresponding to each of the POs.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom Q-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom R-^(th) PDCCH monitoring occasions for paging.

A 4th PO is set of X consecutive PDCCH monitoring occasions startingfrom S-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information. In anembodiment, each PO can comprise of ‘R’ sub POs where each sub POconsists of ‘X’ PDCCH monitoring occasions, X is number of SSBs; in oneembodiment X is maximum number of SSBs i.e. L; in another embodiment Xis equal to actual transmitted SSBs. The number of sub POs i.e. R isalso signaled by gNB. In its PO (identified by PO index) UE may monitorone or more sub POs. The starting PDCCH monitoring occasion number ofeach of these sub POs of a PO is signaled by gNB. Alternatley, an offset‘0’ can be signaled between the sub POs. The starting PDCCH occasionsnumber of 1^(st) sub PO is the starting PDCCH occasions number of PO.Let's say starting PDCCH monitoring occasion number of PO is P andoffset is O. 1^(st) sub PO is a set of X consecutive PDCCH monitoringoccasions starting from Pth PDCCH monitoring occasions for paging.2^(nd) sub PO is a set of X consecutive PDCCH monitoring occasionsstarting from (P+X+O)th PDCCH monitoring occasion for paging. 3^(rd) subPO is a set of X consecutive PDCCH monitoring occasions starting from(P+2X+2O)th PDCCH monitoring occasion for paging and so on.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) is sequentially numbered from 0. The first PDCCH monitoringoccasion number for the first PO can be signaled by the gNB. The gNB canalso signal an offset between the starting PDCCH monitoring occasion ofeach PO. For example, if Ns is equal to 4, then the i_s values will be 0to 3 and there are four POs. The gNB can signal the PDCCH monitoringoccasion number (P) of the first PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+O)-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2O)-^(th) PDCCH monitoring occasions for paging.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3O) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) are sequentially numbered from 0. The first PDCCH monitoringoccasion number for the first PO can be signaled by the gNB. The gNB canalso signal an offset between the last PDCCH monitoring occasion of a POand starting the PDCCH monitoring occasion of the next PO. For example,if Ns is equal to 4, then the i_s values will be 0 to 3 and there arefour POs. The gNB can signal the PDCCH monitoring occasion number (P) ofthe first PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+X+O)-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2X+2O)-^(th) PDCCH monitoring occasions for paging.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3X+3O)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the slot index for the first PO can be signaled by the gNB.The gNB can also signal an offset between the starting slot of each PO.For example, if Ns is equal to 4, then the i_s values will be 0 to 3 andthere are four POs. The gNB can signal slot index (S) of the first POand an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S of paging frame.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S+O.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S+2O.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S+3O and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 2: The paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space

The UE determines the RMSI pattern from the RMSI configuration signaledby the gNB.

If RMSI pattern is 2 or 3,

-   -   A 1^(st) PO is the set of PDCCH monitoring occasions for the        RMSI in the 1^(st) half frame of the determined PF.    -   A 2^(nd) PO is the set of PDCCH monitoring occasions for the        RMSI in the 2^(nd) half frame of the determined PF.

If RMSI pattern is 1,

-   -   A 1^(st) PO is the set of PDCCH monitoring occasions for the        RMSI, wherein the 1^(st) PDCCH monitoring occasion starts in the        determined PF.

Option 3: The paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space.

If the paging search space with the search space Id zero is configuredby the gNB, the PDCCH monitoring occasions for paging are same as thePDCCH monitoring occasions for the RMSI. Based on the RMSIconfiguration, the UE knows the PDCCH monitoring occasions for paging inthe determined PF and subsequent radio frames. The UE knows the 1stPDCCH monitoring occasion for paging in the PF and also the subsequentPDCCH monitoring occasions for paging.

The PDCCH monitoring occasions starting from the 1st PDCCH monitoringoccasion for paging in the paging frame (or from the start of the PF)are sequentially numbered from 0.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions starting from the 1st PDCCHmonitoring occasion for paging in the paging frame (or from the start ofthe PF) are sequentially numbered from 1.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 4: Subframes or slots corresponding to each PO is pre-defined asin LTE.

Embodiment 10

FIG. 10 illustrates another example of determining according to anembodiment of the disclosure.

Referring to FIG. 10:

0) The UE acquires the paging configuration (Default DRX Cycle Duration,Ns, nB, Offset), the paging search space configuration (if signaled bythe network) and the RMSI configuration (RMSI search space, RMSI patterninfo: Pattern 1, 2, 3) from the system information signaled by thenetwork (1010). The RMSI is also be referred as SIB1. The RMSI patternis also referred as the SS/PBCH block and the CORESET multiplexingpattern. In the RRC Connected State, the paging search spaceconfiguration is signaled by the network for one or more configuredBWP(s) in dedicated signaling and the UE uses the paging search spaceconfiguration of its active DL BWP.

1) The UE first derives a Paging frame (1020). The paging frame is theradio frame with the SFN which satisfies following Equation 28:(SFN+offset) mod T=(T div Num_PF)*(UE_ID mod Num_PF)   Equation 28

Where,

T: DRX cycle of the UE. T is determined by the shortest of the UEspecific DRX values, if configured by the RRC or by the upper layers(e.g. NAS), and a default DRX value signaled in the system information.If the UE specific DRX is not configured by the RRC or by the upperlayers, the default value is applied.

nB: number of POs in DRX cycle. nB is signaled by the gNB in the systeminformation. The values of nB can be 4T, 2T, T, T/2, T/4, T/8, T/16,T/32 and so on.

N: nB/Ns

In an example, the UE_ID can be {IMSI mod 1024} or {5G-S-TMSI mod 1024}.

The paging frame is the radio frame with respect to which the UEdetermines its PO. A PO associated with a PF may start in the PF orafter the PF. A PO which starts in the paging frame may end in thesubsequent radio frame.

2) The UE then calculates an index i_s (1030), where i_s is derived fromthe following Equation 29:i_s=floor(UE_ID/Num_PF)mod Ns, where  Equation 29

N: nB/Ns

In an example, the UE_ID can be {IMSI mod 1024} or {5G-S-TMSI mod 1024}.

3) The UE monitors the PO indicated by i_s (1040). If i_s=0, the UEmonitors the 1st PO; If i_s=1, the UE monitors the 2nd PO; If i_s=2, theUE monitors the 3rd PO; and so on.

UE determines the PDCCH monitoring occasions corresponding to the POindicated by i_s as follows:

Option 1: The paging Search Space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space.

The gNB may signal paging search space configuration (comprising atleast one of parameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration). The UE determines a PDCCH monitoring occasion from the PDCCHmonitoring periodicity (Monitoring-periodicity-PDCCH-slot), the PDCCHmonitoring offset (Monitoring-offset-PDCCH-slot), and the PDCCHmonitoring pattern (Monitoring-symbols-PDCCH-within-slot) within a slot.The PDCCH monitoring occasions are there in slots ‘x’ to x+duration,where the slot with number ‘x’ in a radio frame with number ‘y’satisfies the Equation 30:(y*(number of slots in a radio frame)+x−Monitoring-offset-PDCCH-slot)mod(Monitoring-periodicity-PDCCH-slot)=0;  Equation 30

The starting symbol of a PDCCH monitoring occasion in each slot havingPDCCH monitoring occasion is given byMonitoring-symbols-PDCCH-within-slot. The length (in symbols) of a PDCCHmonitoring occasion is given in the corset associated with the searchspace.

If the paging search space is configured by the gNB, wherein thesearchSpaceId other than zero is configured for the Paging Search Space,based on the paging search space configuration (comprising at least oneof parameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration), the UE knows the PDCCH monitoring occasions for paging in thedetermined PF and the subsequent radio frames. The UE knows the 1stPDCCH monitoring occasion for paging in the determined PF and also thesubsequent PDCCH monitoring occasions.

The PDCCH monitoring occasions for paging from the start of thedetermined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of PF) issequentially numbered from 0. The maximum number (L) of SSBs perfrequency band is pre-defined. The gNB signals the information(SSBPositionsInBurst) related to the actual transmitted SSBs in thesystem information.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 1. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of PF) aresequentially numbered from 1. The maximum number (L) of SSBs perfrequency band is pre-defined. The gNB signals the information(SSBPositionsInBurst) related to the actual transmitted SSBs in thesystem information.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of PF) aresequentially numbered from 0. The first PDCCH monitoring occasion numberfor each PO can be signaled by the gNB. For example, if Ns is equal to4, then the i_s values will be 0 to 3 and there are four POs. The gNBcan signal PDCCH monitoring occasion numbers (P, Q, R, S) onecorresponding to each of the POs.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom Q-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom R-^(th) PDCCH monitoring occasions for paging.

A 4th PO is set of X consecutive PDCCH monitoring occasions startingfrom S-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information. In anembodiment, each PO can comprise of ‘R’ sub POs where each sub POconsists of ‘X’ PDCCH monitoring occasions, X is number of SSBs; in oneembodiment X is maximum number of SSBs i.e. L; in another embodiment Xis equal to actual transmitted SSBs. The number of sub POs i.e. R isalso signaled by gNB. In its PO (identified by PO index) UE may monitorone or more sub POs. The starting PDCCH monitoring occasion number ofeach of these sub POs of a PO is signaled by gNB. Alternatley, an offset‘O’ can be signaled between the sub POs. The starting PDCCH occasionsnumber of 1^(st) sub PO is the starting PDCCH occasions number of PO.Let's say starting PDCCH monitoring occasion number of PO is P andoffset is O. 1^(st) sub PO is a set of X consecutive PDCCH monitoringoccasions starting from Pth PDCCH monitoring occasions for paging.2^(nd) sub PO is a set of X consecutive PDCCH monitoring occasionsstarting from (P+X+O)th PDCCH monitoring occasion for paging. 3^(rd) subPO is a set of X consecutive PDCCH monitoring occasions starting from(P+2X+2O)th PDCCH monitoring occasion for paging and so on.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1st PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) are sequentially numbered from 0. The first PDCCH monitoringoccasion number for first PO can be signaled by the gNB. The gNB canalso signal an offset between the starting PDCCH monitoring occasion ofeach PO. For example, if Ns is equal to 4, then the i_s values will be 0to 3 and there are four POs. The gNB can signal the PDCCH monitoringoccasion number (P) of the first PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+O)-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2O)-^(th) PDCCH monitoring occasions for paging.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3O)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions for paging from the start ofthe determined PF are sequentially numbered from 0. In other words, thePDCCH monitoring occasions starting from the 1^(st) PDCCH monitoringoccasion for paging in the paging frame (or from the start of the pagingframe) are sequentially numbered from 0. The first PDCCH monitoringoccasion number for the first PO can be signaled by the gNB. The gNB canalso signal an offset between the last PDCCH monitoring occasion of a POand starting the PDCCH monitoring occasion of next PO. For example, ifNs is equal to 4, then the i_s values will be 0 to 3 and there are fourPOs. The gNB can signal the PDCCH monitoring occasion number (P) of thefirst PO and an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom P-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+X+O)-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+2X+2O)-^(th) PDCCH monitoring occasions for paging.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom (P+3X+3O)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the slot index for the first PO can be signaled by the gNB.The gNB can also signal an offset between the starting slot of each PO.For example, if Ns is equal to 4, then the i_s values will be 0 to 3 andthere are four POs. The gNB can signal slot index (S) of the first POand an offset O.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S of paging frame.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S+O.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S+2O.

A 4^(th) PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasion in slot S+3O and so on.

Where X is a number of SSBs. In one embodiment X, is maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 2: The paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space

The UE determines the RMSI pattern from the RMSI configuration signaledby the gNB.

If RMSI pattern is 2 or 3,

-   -   A 1st PO is the set of PDCCH monitoring occasions for the RMSI        in the 1^(st) half frame of the determined PF    -   A 2^(nd) PO is the set of PDCCH monitoring occasions for the        RMSI in the 2^(nd) half frame of the determined PF

If RMSI pattern is 1,

-   -   1^(st) PO is the set of PDCCH monitoring occasions for the RMSI,        wherein the 1^(st) PDCCH monitoring occasion starts in the        determined PF.

Option 3: The paging search space is configured by the gNB, wherein thesearchSpaceId zero is configured for the Paging Search Space

If the paging search space with the search space Id zero is configuredby the gNB, the PDCCH monitoring occasions for paging are same as thePDCCH monitoring occasions for the RMSI. Based on the RMSIconfiguration, the UE knows the PDCCH monitoring occasions for paging inthe determined PF and subsequent radio frames. The UE knows the 1stPDCCH monitoring occasion for paging in the PF and also the subsequentPDCCH monitoring occasions for paging.

The PDCCH monitoring occasions starting from the 1st PDCCH monitoringoccasion for paging in the paging frame (or from the start of PF) aresequentially numbered from 0.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 0-^(th) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X-^(th) PDCCH monitoring occasions for paging.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom (i*X)-^(th) PDCCH monitoring occasions for paging and so on.

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Alternately, the PDCCH monitoring occasions starting from the 1st PDCCHmonitoring occasion for paging in the paging frame (or from the start ofthe PF) are sequentially numbered from 1.

A 1st PO is set of X consecutive PDCCH monitoring occasions startingfrom 1^(st) PDCCH monitoring occasions for paging.

A 2nd PO is set of X consecutive PDCCH monitoring occasions startingfrom X+1-^(th) PDCCH monitoring occasions for paging.

A 3rd PO is set of X consecutive PDCCH monitoring occasions startingfrom 2X+1-^(th) PDCCH monitoring occasions for paging and so on.

An ith PO is set of X consecutive PDCCH monitoring occasions startingfrom [(i−1)*X)]+1-^(th) PDCCH monitoring occasions for paging

Where X is a number of SSBs. In one embodiment, X is a maximum number ofSSBs (i.e., L). In another embodiment, X is equal to actual transmittedSSBs. In an embodiment, whether X is the actual transmitted SSBs or notcan be indicated by the network in the system information.

Option 4: Subframes or slots corresponding to each PO is pre-defined asin LTE.

In the methods explained above, if ‘X’ is the actual number oftransmitted SSBs, then these X SSBs are mapped to X PDCCH monitoringoccasions in PO sequentially in ascending order of SSB index. Forexample, let's say L i.e. maximum number of SSBs are 8 (having SSB index0 to 7). If the actual transmitted SSBs are SSB1, SSB4, SSB 5 and SSB 7,then X is equal 4. The SSB1 is mapped to the first PDCCH monitoringoccasion of PO, the SSB4 is mapped to the second PDCCH monitoringoccasion of the PO, the SSB5 is mapped to the third PDCCH monitoringoccasion of the PO and the SSB7 is mapped to the fourth PDCCH monitoringoccasion of the PO.

FIG. 11 is a block diagram of a terminal according to an embodiment ofthe disclosure.

Referring to FIG. 11, a terminal includes a transceiver 1110, acontroller 1120 and a memory 1130. The transceiver 1110, the controller1120 and the memory 1130 are configured to perform the operations of theUE illustrated in the figures, e.g. FIGS. 1 to 10, or described above.Although the transceiver 1110, the controller 1120 and the memory 1130are shown as separate entities, they may be realized as a single entitylike a single chip. Or, the transceiver 1110, the controller 1120 andthe memory 1130 may be electrically connected to or coupled with eachother.

The transceiver 1110 may transmit and receive signals to and from othernetwork entities, e.g., a BS.

The controller 1120 may control the UE to perform functions according toone of the embodiments described above. The controller 1120 may refer toa circuitry, an ASIC, or at least one processor.

In an embodiment, the operations of the terminal may be implementedusing the memory 1130 storing corresponding program codes. Specifically,the terminal may be equipped with the memory 1130 to store program codesimplementing desired operations. To perform the desired operations, thecontroller 1120 may read and execute the program codes stored in thememory 1130 by using a processor or a central processing unit (CPU).

FIG. 12 is a block diagram of a BS according to an embodiment of thedisclosure.

Referring to FIG. 12, a BS includes a transceiver 1210, a controller1220 and a memory 1230. The transceiver 1210, the controller 1220 andthe memory 1230 are configured to perform the operations of the network(e.g., gNB) illustrated in the figures, e.g. FIGS. 1 to 10, or describedabove. Although the transceiver 1210, the controller 1220 and the memory1230 are shown as separate entities, they may be realized as a singleentity like a single chip. The transceiver 1210, the controller 1220 andthe memory 1230 may be electrically connected to or coupled with eachother.

The transceiver 1210 may transmit and receive signals to and from othernetwork entities, e.g., a terminal.

The controller 1220 may control the BS to perform functions according toone of the embodiments described above. The controller 1220 may refer toa circuitry, an ASIC, or at least one processor.

In an embodiment, the operations of the BS may be implemented using thememory 1230 storing corresponding program codes. Specifically, the BSmay be equipped with the memory 1230 to store program codes implementingdesired operations. To perform the desired operations, the controller1220 may read and execute the program codes stored in the memory 1230 byusing a processor or a CPU.

While the disclosure has been shown and described with reference tovarious embodiments thereof, it will be understood by those skilled inthe art that various changes in form and details may be made thereinwithout departing from the spirit and scope of the disclosure as definedby the appended claims and their equivalents.

While the disclosure has been shown and described with reference tovarious embodiments thereof, it will be understood by those skilled inthe art that various changes in form and details may be made thereinwithout departing from the spirit and scope of the disclosure as definedby the appended claims and their equivalents.

What is claimed is:
 1. A method performed by a terminal in a wirelesscommunication system, the method comprising: receiving, from a basestation, first information on a number of paging frames in adiscontinuous reception (DRX) cycle, second information on an offset(Offset), and third information on a number of paging occasions (POs)per paging frame; identifying a paging frame based on the firstinformation and the second information; identifying an index for a PObased on the first information and the third information, the POincluding a number of physical downlink control channel (PDCCH)monitoring occasions for paging; and monitoring the PDCCH monitoringoccasions for paging in the PO, wherein the paging frame is identifiedby Equation 1:(SFN+Offset) mod T=(T div N)*(UE_ID mod N)  Equation 1, wherein the SFNis a system frame number for the paging frame, the T is the DRX cycle,the N is determined by the first information, the UE ID is an identityof the terminal, wherein the index of the PO is determined by Equation2:i_s=floor (UE_ID/N) mod Ns  Equation 2, and wherein the i_s is theindex, the Ns is determined by the third information.
 2. The method ofclaim 1, wherein the PDCCH monitoring occasions for paging aresequentially numbered from zero starting from the paging frame, andwherein the PDCCH monitoring occasions for paging are identified basedon a paging search space configuration received from the base station.3. The method of claim 1, further comprising: receiving, from the basestation, fourth information which is used for identifying from where themonitoring of the PDCCH monitoring occasions for paging starts.
 4. Themethod of claim 3, wherein the fourth information includes informationon a first PDCCH monitoring occasion number of each PO, and wherein themonitoring of the PDCCH monitoring occasions for paging in the PO startsfrom the first PDCCH monitoring occasion number identified by the fourthinformation.
 5. The method of claim 3, wherein the fourth informationincludes information on a number of synchronization signal blocks(SSBs), the number of the PDCCH monitoring occasions for paging beingequal to the number of SSBs, and wherein the monitoring of the PDCCHmonitoring occasions for paging in the PO is performed based on thenumber of SSBs.
 6. A method performed by a base station in a wirelesscommunication system, the method comprising: transmitting, to aterminal, first information on a number of paging frames in adiscontinuous reception (DRX) cycle, second information on an offset(Offset), and third information on a number of paging occasions (POs)per paging frame; and transmitting, to the terminal, downlink controlinformation (DCI) for paging in a PO of a paging frame, wherein thepaging frame is indicated based on the first information and the secondinformation, and wherein an index for the PO is indicated based on thefirst information and the third information, the PO including a numberof physical downlink control channel (PDCCH) monitoring occasions forpaging, wherein the paging frame is identified by Equation 1:(SFN+Offset) mod T=(T div N)*(UE_ID mod N)  Equation 1, wherein the SFNis a system frame number for the paging frame, the T is the DRX cycle,the N is determined by the first information, the UE_ID is an identityof the terminal, wherein the index of the PO is determined by Equation2:i_s=floor (UE_ID/N) mod Ns  Equation 2, and wherein the i_s is theindex, the Ns is determined by the third information.
 7. The method ofclaim 6, wherein the PDCCH monitoring occasions for paging aresequentially numbered from zero starting from the paging frame, andwherein the PDCCH monitoring occasions for paging are based on a pagingsearch space configuration transmitted to the terminal.
 8. The method ofclaim 6, further comprising: transmitting, to the terminal, fourthinformation which is used for identifying from where a monitoring of thePDCCH monitoring occasions for paging starts.
 9. The method of claim 8,wherein the fourth information includes information on a first PDCCHmonitoring occasion number of each PO, and wherein the monitoring of thePDCCH monitoring occasions for paging in the PO starts from the firstPDCCH monitoring occasion number based on the fourth information. 10.The method of claim 8, wherein the fourth information includesinformation on a number of synchronization signal blocks (SSBs), thenumber of the PDCCH monitoring occasions for paging being equal to thenumber of SSBs, and wherein the monitoring of the PDCCH monitoringoccasions for paging in the PO is based on the number of SSBs.
 11. Aterminal in a wireless communication system, the terminal comprising: atransceiver configured to transmit or receive a signal; and a controllercoupled with the transceiver and configured to: receive, from a basestation, first information on a number of paging frames in adiscontinuous reception (DRX) cycle, second information on an offset(Offset), and third information on a number of paging occasions (POs)per paging frame, identify a paging frame based on the first informationand the second information, identify an index for a PO based on thefirst information and the third information, the PO including a numberof physical downlink control channel (PDCCH) monitoring occasions forpaging, and monitor the PDCCH monitoring occasions for paging in the PO,wherein the paging frame is identified by Equation 1:(SFN+Offset) mod T=(T div N)*(UE_ID mod N)  Equation 1, wherein the SFNis a system frame number for the paging frame, the T is the DRX cycle,the N is determined by the first information, the UE_ID is an identityof the terminal, wherein the index of the PO is determined by Equation2:i_s=floor (UE_ID/N) mod Ns  Equation 2, and wherein the i_s is theindex, the Ns is determined by the third information.
 12. The terminalof claim 11, wherein the PDCCH monitoring occasions for paging aresequentially numbered from zero starting from the paging frame, andwherein the PDCCH monitoring occasions for paging are identified basedon a paging search space configuration received from the base station.13. The terminal of claim 11, wherein the controller is furtherconfigured to receive, from the base station, fourth information whichis used for identifying from where the monitoring of the PDCCHmonitoring occasions for paging starts.
 14. The terminal of claim 13,wherein the fourth information includes information on a first PDCCHmonitoring occasion number of each PO, and wherein the monitoring of thePDCCH monitoring occasions for paging in the PO starts from the firstPDCCH monitoring occasion number identified by the fourth information.15. The terminal of claim 13, wherein the fourth information includesinformation on a number of synchronization signal blocks (SSBs), thenumber of the PDCCH monitoring occasions for paging being equal to thenumber of SSBs, and wherein the monitoring of the PDCCH monitoringoccasions for paging in the PO is performed based on the number of SSBs.16. A base station in a wireless communication system, the base stationcomprising: a transceiver configured to transmit or receive a signal;and a controller coupled with the transceiver and configured to:transmit, to a terminal, first information on a number of paging framesin a discontinuous reception (DRX) cycle, second information on anoffset (Offset), and third information on a number of paging occasions(POs) per paging frame, and transmit, to the terminal, downlink controlinformation (DCI) for paging in a PO of a paging frame, wherein thepaging frame is indicated based on the first information and the secondinformation, and wherein an index for the PO is indicated based on thefirst information and the third information, the PO including a numberof physical downlink control channel (PDCCH) monitoring occasions forpaging, wherein the paging frame is identified by Equation 1:(SFN+Offset) mod T=(T div N)*(UE_ID mod N)  Equation 1, wherein the SFNis a system frame number for the paging frame, the T is the DRX cycle,the N is determined by the first information, the UE ID is an identityof the terminal, wherein the index of the PO is determined by Equation2:i_s=floor (UE_ID/N) mod Ns  Equation 2, and wherein the i_s is theindex, the Ns is determined by the third information.
 17. The basestation of claim 16, wherein the PDCCH monitoring occasions for pagingare sequentially numbered from zero starting from the paging frame, andwherein the PDCCH monitoring occasions for paging are based on a pagingsearch space configuration transmitted to the terminal.
 18. The basestation of claim 16, wherein the controller is further configured totransmit, to the terminal, fourth information which is used foridentifying from where a monitoring of the PDCCH monitoring occasionsfor paging starts.
 19. The base station of claim 18, wherein the fourthinformation includes information on a first PDCCH monitoring occasionnumber of each PO, and wherein the monitoring of the PDCCH monitoringoccasions for paging in the PO starts from the first PDCCH monitoringoccasion number based on the fourth information.
 20. The base station ofclaim 18, wherein the fourth information includes information on anumber of synchronization signal blocks (SSBs), the number of the PDCCHmonitoring occasions for paging being equal to the number of SSBs, andwherein the monitoring of the PDCCH monitoring occasions for paging inthe PO is based on the number of SSBs.